So I finished the game.
Really underwhelming ending IMO. The story reveal for the last fight was anime weeaboo levels of bullshit party where all the superbads are suddenly not-dead and everyone fights in one big battle. Ended with no real resolution. Maybe with expac/patch/dlc/whatever. I kept getting murdered because it frustratingly pulls all your chars in and the main dude just aoe explodes you most of the time. Eventually I tried cheesing the fight by dropping a crate of deathfog and just teleporting him into it turn 1. Funny that it worked but really anticlimactic that he just died instantly from it. I wouldn't say it really trivializes the encounter, but it certainly makes it easier.
I dunno, I would rate this game probably 7.5/10 overall. With good patches it could be an 8 easily. Maybe with a few expacs, 9/10. But as it stands it's just 'very good', not great.
Very good overall but hindered by:
1) UI is plagued with shit and is mostly garbage.
2) Story had some gaps and issues where things didn't make sense if you didn't approach it in a standard way. For example, doing A then B gives you all these options, finding B first and your character mysteriously doesn't remember on some quests and you can never continue (granted side quests generally but still annoying).
3) Gear scaling at the end is bullshit. It's like 30% bonus+ per level it's dumb.
4) Ending was weak, I felt that the 'game', that is all of the threads I cared about, concluded before the final encounter. It was anticlimactic in that all the chaos/minions/etc. had been taken care of before you descend to face the duders. Problem is since the real threat was secret until the very end, it loses narrative punch because you resolve it as soon a you discover it.
5) I felt that Driftwood area was kind of unfocused and dragged a bit. There's a lot of interesting bits going on there but there wasn't as much dilemma as the first area or urgency as the second and I really fucking hated everything to do with Paradise Downs and the dumb lumber mill.
6) All the endings are kind of bullshit in a way. I get the theme is 'life sucks in Divinity, go fuck yourself' but meh.
7) Balance is really wonky. It doesn't bother me that wombo combos are good, it's just that certain specs/trees are definitely superior to others.
8) It's really not clear how some shit happens. Especially since you can't always mouse over tooltips (if they are on enemy mobs for instance. Sometimes a dude casts cursed fireball. Sometimes a dude casts fireball and the fire is cursed anyway. Who knows.
9) I don't hold this against the game, but not having an exposed combat system is personally irritating. I love DnD 3.5 based games, it would be great if it operates similarly here as well at least in exposing some elements of chance. With the respec portal it's like "shit, is that a roll or should I go back... is it worth it..."
I would say it's in the top 10%, but it definitely doesn't unseat things like NWN2 or PS:T IMO when I consider how long ago those games came out. I hope they make more, though.