Conjured up a list of changed taken from DustLoop, SRK, andTwitter. These are probably not complete.

Universal System Changes:
- Shadow type characters carries meter over the round. Shadow characters have no burst and awakening. Shadow berserk mode is like OC from SF
- Shadow characters start the round with 100 meter
- Elizabeth and Shadow Labrys do not have a Shadow mode.
- Guardroll added.
- Attacks can be canceled into short hop
- Attacks can be done after short hop
- Air moves can now be used after backdash
- Whiffed DPs are not fatal counterable by all moves. False rumors
- Damage seems significantly lower for ALL characters
- AOA > D followup > special
- Shadow Awakening: Unlimited meter on a timer.
- Every character except for Kanji Tatsumi has Skill Boost supers; 75 meter for more damage.
-Gold burst nerfed, much longer overall frames.
- Every character except for Kanji Tatsumi has Skill Boost supers; 75 meter for more damage.
- Every character has a new auto combo with “unique and flashy” animations.
- New stage: Entrance to Tartarus.

Everyone has different number cards:
    Yukiko Amagi – 5
    Elizabeth – 6
    Akihiko Sanada – 2
    Shadow Labrys – 6
    Chie Satonaka – 3
    Teddie – 5
    Kanji Tatsumi – 3
    Naoto Shirogane – 4
    Yosuke Hanamura – 3
    Junpei Iori – 4
    Yukari Takeba – 4
    Labrys – 3
    Mitsuru Kirijo – 4



Elizabeth:
- Can feint R-action, 75% * awakening gives A+B Dia & heals ~40%, B.Bufu freeze 2x?, A.Bufu freeze on (1), D.Garu +startup +recovery
- Garukasu gone, A autocombo change, AAA throws a card, launches them w/ a tornado on hit, air bdash travel is shorter? A.Zio is 1 hit
- AA not much recovery? JB > JA doesn't work? maybe JB has more recovery? 5C(2) can pass through and whiff if too close/point blank
- New move RANDOMIZER, is a counter, forces negative penalty on hit. A ver duration is short, B ver duration is long.
- Awakening: Garu: appears bigger, loops become avail, can launch by itself. Agi: C+D travel back and forth now, basically free SB Agi
- Awakening: SB Agi: # of pillars increased, orig 9 hit now is 11~13
- now has a j.2B

Aegis:
- Air radical cannon added
- Command air dash added (?)
- Double megido not possible
- Air horizontal machine gun taken out
- Autocombo changed
- New 2C Move
- "air-rush super like Guile in MVC2" according to Jiyuna
- (Not Confirmed) New 2C Might be Anti-Air
- (Not Confirmed) It looks like j.C is slower and mode change to j.C might not work

Kanji:
- 5C paralyzes the opponent. (only on hit)
- 236A performable in air.
- EX chair super wallbounds on last hit.
- j.B to 214B no longer works.
- Air backdash distance reduced by half.
- Normal grab range shortened.
- Recovery after j.C is increased.
- j.B Untechable time reduced
- Air Dive is slower
- (Not Confirmed) 5AA and 5AAA are now different. 5AA now hits like A.B.A.'s Moroha HS, 5AAA throws the opponent into the air. Theoretically we can combo after that with air moves. 5AA has the same cancel options as it does now.
- (Not Confirmed) 236A and 236B follow changed, not quite sure how at the moment. SB version is either unchanged or just hasn't been changed yet.
- (Not Confirmed) Faster sweep?
- (Not Confirmed) D grab changed (able to move before throw comes out?)

Mitsuru:
- New move: confuses opponent.
- New move: ground ice wave projectile.
- Bufudyne appears to come out faster.
- D Bufula travels roughly half screen distance.
- New Auto Combo (Buff? probably, since her previous one was decent at best)
- 2DD now causes slide, side swaps and followup combos presumably easier
- SB Bufudyne takes up roughly 3/4 of the screen
- Possible major damage nerf. Jiyuna tweeted "Hahah. Mitsuru standard corner bnb with Air mirror and Super ender....3100 damage."
- If her DP is blocked, she slows down and is easily punishable.
- 2B is slower.
- Can no longer combo off 2D (this could mean that you can't pick them up as they fall after the freeze)
- D follow up doesn't pull as far (Not sure how this will affect combos)
- Second hit of auto combo is lower. (Confirmed now that this makes 5AA > 5B air combos impossible, so this is a bad thing.)
- 5AA > 5B combo no longer works on an airborne opponent (Dang...)
- Coup Droit B is "much shorter"
- Coup Droit A is "slower"
- Bufudyne is smaller
- Invuln changes to 2B and sweep (Assuming this is a bad thing)
- DP range shortened / DP hitbox changed (assuming smaller)
- Droit hitbox is smaller (assuming smaller vertical hitbox, will catch airborne opponents less)
- D bufula starts farther away so you cant use it in corner mixup
- SB bufula = slower
- Blocked DP > Super still in.

Naoto:
- 2nd hit of AAA is low

Yu:
- Sweep > 5D has been removed.
- New super is Gatotsu.
- New move: 214B feint.
- New move: command grab.
- No jump cancel on block for 5B, 2B, 5C.
- New move: 236A/B.
      - Short dash then slice.
      - Short dash then throw.
- Third hit of auto combo is a mini-DP, opponent can backdash on block.
- Jump D is fast.


Shadow Labrys:
- New air move
- Has Chain Knuckle
- Ground Guillotine Axe bounces instead of knockdown
- Massive Slaughter (command grab) now inflicts Fear
- It takes longer to recover Persona Cards
- No wallbounce on counterhit DP
- DP range appears shorter
- Does not have the new gameplay feature "Shadow Mode"
- Hammer Uppercut (8C) and Terra's Eruption (2C) have swapped inputs - Uppercut is now 2C, flames is now 8C

Yosuke:
- Kunais now knockdown
- Down to 3 Persona cards
- Glide wasn't present in the loctest
- Moonsault invul may be gone
- Can still do instant air-dash jump A cross-ups

Chie:
- SB God’s Hand uses two hands instead of one.
- New move: Yun-esque lunge punch.
      - Can be done after hop kicks.
      - SB version wallbounces and fatal counters.
- Can now make meteors appear behind opponent to push them towards her.
- 5C range shortened.
- Second hit of auto combo hooks opponent similar to Akihiko Sanada.
- 5D Oki escapable by not teching early
- Divekick Move

Yukiko:
- 5 Persona Cards
- New move and a new super which requires >lv6
- Agi and Agi SB speed has been increased

Akihiko:
- Cyclone Level can now go up to five.
- 236A > 6A/B knocks opponent into the air.
- Regains cards quick after Persona Break, but only has 2 Persona cards.
- 22A/B after ducking for new low profile move
- Slower 5C

Teddie:
- Can All-Out Attack when airborne.
- New auto combo.

Junpei:
- Big, appears faster than Kanji.

Yukari:
- 2A is slow and low.
- Has a forward air-flip move similar to Hawkeye in Ultimate Marvel vs. Capcom 3.

Labrys:
- New move: Persona charges an orb and releases it. Opponent gets stuck in a bubble if hit.
- Full charge 2B is unblockable.