That's a mighty fine game. Almost 100 hours of my time spent, but never quite finished. Maybe with the new big patch?
It seems that nobody was able to finish this game and this tells a lot sadly.
Larian needs to change that fucking silly theme and hire some decent writers, because most of their games are a chore to finish.
The story isn't the main problem, Larians first 3 games were just as goofy. D:OS gets too easy after Cyseal and then they have questionable design choices like Tenebrium making standard weapons nearly obsolete since whenever a weapon deals just 1 damage of Tenebrium damage your character used the Tenebrium skill instead of the weapon skill for that particular weapon.
Quite a few talents are weak, have no impact real impact or can be even detrimental like Elemental Ranger.
They did address some issues like being able to get over 100% resistances and subsequently getting healed from these damage types and it was not too hard
Magic becomes a bit too strong due to Intelligence CD reduction, this should be much more limited as well.
The game also needs some fixed waepons/armor which are really uniqoue and give a sense of progression when you reach these points, preferably through either difficult combat or difficult quest. As it stands you just use blue/green items one after another but nothign really "feels" in a way "epic" or something you really achieved/earned.
What this game needs is another polish for the all areas after Cyseal and rebalanced talents/skills. Also the game lacks some options for melee like dual wield or sword&board.