I'm certain that some Baldur's Gate 3 fans would love to only control your main character and let the AI handle your companions in combat. And there is now a mod that allows for such a thing.
I imagine it’s the same ai level that you play against the whole game so… some fights are brain dead and some fights I feel like I’m playing against a chess master
I'd say it's fairly good. It's so good, in fact, that when you leave it no good moves to make because you obliterated their strongest dude and then jumped 30 squares away in a single turn, it literally holds the game up for a solid minute or so trying to figure out what to do.
If the AI for the ghouls from Danse Macabre is any example, they make stupid choices. The ghouls can be standing next to an enemy and waste their turn with Dash to get to another enemy.
Under certain circumstances Lae'zel tells you that she's thinking of boning Wyll or Astarion. And afterwards that she did so. So there's definitely some major bonage going on in the background.
In my head canon Wyll and Karlach also got together.
Semi related but can I just rant for a second about the fact that Tav is simultaneously the least interesting character and also the glue that holds the party together?
The other characters will straight-up refuse to interact with each other outside of special cutscenes. And even then, they almost always let Tav make their decisions for them. I wish each character could have full interaction with each other character. Like I could switch to Laezel, talk to Karlach, and I'd see a bit of relationship development between the two of them, then switch to Shadowheart and go talk to Gale and have a totally different kind of relationship form
It stems from your character being a blank slate that you act through. They don’t bring much story with them, just your headcanon and whatever you enact. It’s a true RPG in that way. I think that’s part of the reason people end up going the horny route, it’s a means of placing yourself in the story and becoming part of all of these fantastic characters. The main character is only as interesting as you make them.
It's pretty clear that Redeemed Durge Tav is the canonical Tav and the most interesting. All the other versions are bland in comparison.
But you can definitely get some of the interactions you're looking for by playing an Origin character. Playing as Karlach, I definitely created non-canonical interactions with the other Origin characters.