Many of these points are reiterations from my previous submission.

In PDF order.

Obliterating Exposure's flavor text hasn't been fixed.
Void Ooze's flavor text hasn't been fixed.
Pulse of the Maggots makes Insect type tokens named Maggot. Just make them Maggot tokens like Curse of the Marsh and Gestating Blowfly. Also fix the token card to reflect this. The other option is to change all the other Maggot-producing cards to make "Insect tokens named Maggot", which is unwieldy and quite silly, since it creates memory issues and has no relevance in the set.
Spreading Ooze's flavor text should have the "Grow and" removed.
Symbiotic Meltdown: "At the beginning of each (delete "player's") upkeep...share the highest power (add comma) exile them both...under their owners' (apostrophe moved) control."
Don't forget to use the color indicator on Thought Storm whenever MSE gets around to updating. Note that Dryad Arbor from FTV:Realms uses the color indicator on a standard frame card, so the correct template is known.
Bagan needs "You may" on his first ability so he can tick up without creatures on the battlefield. This is a cardinal law of PWs. What is he supposed to BE, anyways?
Elemental Token shouldn't have haste capitalized.
Blind Aggression's flavor text has a comma splice. Change it to a semicolon or to what I suggested earlier.
Staff of Goblin Devouring: "under your control (add comma) attach". Also it will be the first equipment without an equip ability. Congratulations.
Collector Stone is better worded "Whenever a player casts a noncreature spell with converted mana cost X  or less, return that card to its owner’s hand as it resolves unless any player pays 1, where X is equal to the number of artifacts you control."
Olarin has the keyword "indestructible". I agree that it should be a keyword, but it isn't yet. Instead, the ability "~ is indestructible." is used. Also, Equipment should be capitalized.
Out of the Rubble would be a lot more useful if there were actual mana-producing artifacts in the set.
Suzaku's second ability should be +X/+0 to feel more Mythic. Srsly. Also, the third ability erroneously says "Suzaka". The type line is squished for no particular reason. Are there a bunch of spaces, or is MSE being silly again?
Varhas concerns me because Legendaries aren't typically supposed to die on purpose on their first attack.
Shiob could say "X can't be zero" instead of "nontoken" if you decide that he needs a buff against token decks. He probably doesn't need it though.
Is Eruo supposed to be Euro? That would make sense...
Guardian of Chavest will be abused with bounce in turbo-fog. Not a huge concern, though. Just wanted to point that out. Should also be "Flash (linebreak) Flying". Abilities that affect casting are grouped on the first line, abilities that affect the playing field are grouped on the second line.
Just Retribution: "Choose a permanent. Destroy the chosen permanent and all permanents that share a card type with the chosen permanent."
Volcanic Priest's first ability has player erroneously pluralized.
Avatar of War's flavor text says "War and conflict", then "it" in the next sentence. Singular/plural problem. I would rewrite the flavor text anyways.
Journey to Revelation has an erroneous capital C in its first line.
Dasvol should say "Tokens can't enter the battlefield." Creating a token in exile makes no sense ruleswise.
Ability words (such as on the Legendary Enchantment cycle) are not supposed to be capitalized if they aren't the first word on the line or in the sentence. I realize that this makes MSE mad and I'm not sure how to get around that.
Essence of Ulgris: "one or more" is unnecessary. See [[Kulrath Knight]].
Bond of Chavest is missing a space.
Flow of Irindu's second ability should just be "you may have target creature become". Getting around shroud probably isn't worth the extra room it takes on the card.
Irindu Falls Huntmaster's type line is scrunched for no particular reason. Again, MSE probably being stupid. Another thing: I really like the card now.
Recurring Curse is missing the word "resolves" in the last line.
Venifucian Flowmage has "Flow " capitalized. I don't believe that is correct. I shall joke that this could be the uncommon red 3-mana shocktrigger buildaround enchantment of the set.
I think Viscous Plasma should start at 1/1 to reflect the fact that you probably drew one card this turn. Also, if you flow it, it won't have haste, so you won't get a 2/2 quite yet. I don't think that it's worth it. It should be more like a smaller version of the Flow Sphinx.
Flowstone Wurm: Google "implantation".
Frenzied Empath: Hexproof and shroud in the same set? Sure.
You should use my wording for Ulgrisian Fly. To recap! Uncapitalize "deathtouch", "the", and "shuffle". Remove the comma after "Ulgrisian Fly". Move the last ability to the second line.
Creeping Ichor should be a 1/1 to aid memorization of its P/T. Also, mixing +1/+1 counters and -1/-1 counters is a WotC no-no.
Fizzle is still bad because it needs a creature to target. What's the point of a 2-mana counterspell that can't counter the first spell your opponent plays? Oh well, maybe the power level of counterspells needs to be reined in anyways.
Griffins of Sorok's Reaches has only one creature in the art despite having a plural name. It also says "Our" in the flavor text despite it not being a quote. Make it a quote by a famous Dwarf.
Sorceror's Mantle has an extra colon in it. Replace the first one with a comma.
Dissolution Blade should probably give -2/-0 instead.
Priest of Purgatory's flavor text hasn't been fixed.
True Judgment: "~ can't be countered. (linebreak) Exile target creature." See [[Volcanic Fallout]]. It shouldn't have to be attacking or blocking. [[Unmake]] was a common after all.
Halo of Purity has an erroneous capital C on its first line.
Wicked Accomplice should have haste uncapitalized. Flavor text needs either a comma after been or a colon after G'reils. Also, I think the plural of G'reil should be just G'reil.
Chains of Chavest: I still think this slot should change since the ability doesn't fit in black.
Twilight Angel should have a name that better reflects its creature types. Even [[Fallen Angel]] isn't a Demon. Its LTB effect should be "each player loses 3 life". Kinda like [[Orzhov Guildmage]].
Why is Blightburst worse than the common [[Wrecking Ball]]? I guess it goes well with Chavest's land sac theme, but srsly...
Rise Again should probably specify that it returns the card to the battlefield under your control. The "If you don't" doesn't work like you expect it to due to the intervening if clause. You would have to word it like I suggested, "Exile it unless you control a permanent with the same name" despite it triggering etb and ltb effects. I recommend just cutting that part out.
The nerf on Tainted Bonds makes me sad.
Swampwater Vine: Capitalize "Island" and "Swamp". Change "not" to "no" in the flavor text.
Spitvenom Widow: Flavor text presumably misspells "Ulgrisian".
Gestating Blowfly's ability still has the erroneous "a".
You should reconsider my suggestions for Jungle Sickness. It still reads poorly and is unnecessarily weak. At least [[Earthbond]] had BDSM going for it.
Fight for Survival: "Prevent all combat damage that would be dealt by creatures that weren't chosen." Still weaker than [[Terrifying Presence]]. Could cost G.
Sinking Ambitions uses improper wording and would require a rules change to work properly.
Miremind has "repeat" incorrectly pluralized. It should also use "his or her".
Bloodseeking Bat: "one or more" is unnecessary.
Rat of the Fens has improved but not fabulous flavor text. Take out the "in" or add an "out". Suggestion: "The term ‘rat’ is applied loosely. Most rats don’t breath muck and spew pestilence."
Mental Slough is much improved, but they'll still take the discard 90% of the time. Also, the flavor text should say "erodes" or "energies".
Broadening Horizons: Comma after upkeep.
Noxious Bog-Toad: It could move a counter from any creature you control! That would be cool, and combo with some other neat cards.
Blightforce's Suppression: "Whenever... you may have target player..."
Acidic Nightcrawler should say "If", not "When". This effect would be great as a global buff for a rare btw.
Stormsurge incorrectly capitalizes Flow and Trample.
Arbor Broodmother: "If the discarded card is a creature card..."
On Fire: So Eruo isn't Euro? Now I'm confused. The name of this card makes it sound like an Aura.
United Elements should have a space in first strike.
Tricky Wizardry: "from". This might need a rules change to work properly as well unless you reword it. I don't think this card doesn't even deserve a slot.
Shifting Terrain has an erroneous capital L. I think the Enchant line always goes first no matter what.
Bloodcry of the Reikaproud is really awesome as an Enchantment, and needs to put a space in first strike.
Granketh: Lord is an outmoded creature type.
Viashino Sling-Raiders is still unnecessarily wordy. It's a common. Please.
Ritualistic Bowman: Again with the "our". Make it a quote.
"When Chaven Priest dies, you gain 3 life."
Chav Highguard needs a space in first strike.
Celebration of the Lost: "you gain 1 life".
Chaven Groundskeeper: "you gain 2 life".
Favorable Fire-Bombing: "if B was spent to cast... and you gain that much life".
G'reil's Rule: "is greater than". In the flavor text, doesn't G'reil Tvoul have a title?
Flamewielder's Determination is both spelled wrong and confusing.
Forced Sanctions: This ability needs to be worded like [[Aether Storm]], which is unfortunate.
G'reil: You don't destroy creatures or lands. Spells and abilities you control do. Also, perhaps it would be better instead of replacing the destruction to add it on instead.
Asphirith's Bogborn's flavor text is still funky.
Tharin'l Blessing is missing "Enchant creature".
Needs of the Glade: "Search your library for a basic land card and put it in your graveyard, then shuffle your library;..."
Gladeparter Blessing: "it has". "1G: Regenerate enchanted creature" would still be better for a common.
Noggle Obliterator needs a flavor text redux.
War-Time Mount needs a space in first strike.