Not sure where all the supposed bugs in Act 3 are because I'm not seeing them myself.
Started early for me. Some leftovers from even act 1. Some quests never completed or set stage properly, I'm for example still supposed to talk to the Tieflings in act 2 that never showed up to the inn after being rescued, their leader I did very much rescue and told him to go back but he's also just gone and the few who made it to act 3 don't acknowledge that I rescued him or he came back. One of the steps in the Raphael quest line is bugged, completely locking me out of an important path unless I do want to make a deal with him. Quest log still says I didn't rescue the druid, in another it says I did but left him behind in the grove, and he didn't show up in my camp for a long time until he just poofed in at a random point letting me do his quest.
Jumping is getting iffy as in there's a decent chance the game tells you a jump is totally and doable the character will get stuck on something and just waste the action and there's a weird thing with jumping, reaction attacks, and Polearm mastery where the character will take damage before the jump, not do the react and just be stuck in place in the original position.
The green chick also got stuck in the map I think during the act 2 boss fight and some fight in act 3 where when I wanted to move her I was just stuck in blackness and couldn't do anything but from the point of view of the other characters it varied from just her pants floating in mid air with nothing in it, her blinking in and out of existence about five times a second, or just T-posing while being unable to act.
Also I'm now apparently allied with King bad guy because I stumbled upon the underground murder council before I got to the part where I tell him to fuck off.
First time I did Grymforge in the part with the cave in or in the rafters section the game crashed every thirty seconds to two minutes, I had to brute force with quick save so much until I got through, and the exploding cave mushrooms crashed my computer so hard it just turned off.
It's nice that you're not having any bugs yourself but for me and plenty other people it's a complete shit show and I didn't even get into the small things you can get out of just by fast travel or murder.
As for enjoyment well there's some good stuff here, kind of mixed in with the bugs and things I still consider bullshit. They've very much cut down on the enemies just throwing you down a hole if you don't do it first after act 1 which is nice. There's some pretty good encounters in general later on but friendly AI is really fucking bad. They're a lot like enemy AI only you do want to keep them alive not charging headfirst into the exploding death robots so that quest sucked. Just not enjoying it as much as the Divinity games, it just feels weaker even though there's tons of content. Also still have no idea why non lethal is even an option if those takedowns count as kills anyway for the story characters except that one time in Grymforge where it didn't count as freeing the gnomes properly so that was weird.