FFXIV Shadowbringers Potential Unsynced Soloing

While we are presently unable to solo unsync any content from Shadowbringers at this time and won't for nearly another 2 years, I'm documenting some aspects of things I've seen in regards to soloability of Shadowbringers content and will try to update as the expansion goes along and new content is added, and see how things turn out after 6.0 is released.

Dungeons
Holminster Switch - Second boss has a stack marker. Final boss has a binding mechanic. The latter may cause issues.
Dohn Mheg - 2nd boss has a wipe mechanic with tethers. Final boss has a DPS check.
The Qitana Ravel - Should be no issue.
Malikah's Well - Lots of damage on the 1st boss, but should generally be no issue.
Mt. Gulg - Should be no issue.
Amaurot - Meteors on the 1st boss (possibly only 1 instead of the usual 3). DPS checks and high damage on the 2nd boss. DPS check on the final boss.
The Twinning - Mechanics on the 1st boss might adjust due to fewer players. Otherwise foresee no issues.
Akadaemia Anyder - Final boss might get some damage buffs depending on number of thunderbolts used, but should only cause minimal concern.
The Grand Cosmos - Final boss does fewer charges if there's less people alive, so should be no issue solo.
Anamnesis Anyder - First boss's outgoing damage may be a bit rough, but if you can get past that, it's definitely doable.
Heroes' Gauntlet - Depends on how the 2nd boss mechanics adjust, but I think it's doable

Trials
Titania - DPS check for intermission might be a big concern, especially with how much damage Puck and Peaseblossom put out in the first part, and damage + how spread out they are in the 2nd part.
Titania EX - Don't foresee this being soloable due to the tether mechanic.
Innocence - Intermission DPS check may be an issue.
Innocence EX - Not going to be doable due to adds tethering.
Hades - Not going to be doable due to doom and capture mechanics
Hades EX - Not going to be soloable due to numerous mechanics.
Ruby Weapon - Might not be possible due to 2nd phase meteors.
Ruby Weapon EX - Not doable due to adds tethering in 2nd phase.
Varis EX - Not doable due to intermission mechanics.
WoL - May be an issue due to Extreme Walking Dead.
WoL EX - Not doable due to adds tethering in 2nd phase, plus other mechanics.

Raids
E1 - Eden Prime - Outgoing damage may be an issue, especially on the intermission.
E2 - Voidwalker - Stack mechanic and tank buster may be an issue. Portals may make it unsoloable, depending on how damage mechanics will work at Lv 90.
E3 - Leviathan - Should be doable, though tankbuster is scary.
E4 - Titan - Should be doable, though outgoing damage is scary.
E5 - Ramuh - Should be doable.
E6 - Garuda + Ifrit - The shared tether on Ifrit will probably make it unsoloable.
E7 - The Idol of Darkness - If you can clear the DPS check, the rest of the fight should be a joke.
E8 - Shiva - DPS check at the end will be the true check of soloability.

These apply to normals. I'm 99.9% certain none of the savages are doable.

24-man Raids
Not happening.