I would really like the fights to have more counters and things. It seems like a lost opportunity, to allow wizards to switch out spell sets on a whim, and then have no real reason to. I don't necessarily want it to be as extreme as BG2 was, where you either dispelled them or they were invincible, but something to give me some more incentive to switch out grimoires once in a while would be nice. Seems like a waste to give Batman these utility belts
I am however, totally in support of things doing some damage no matter what, even if it doesn't make a ton of sense (like fire blights taking fire damage). Mostly because I remember building a shadowdancer in NWN SoU, all excited to be able to hop in and out of the shadows doing sneak attacks, only to find that everything was undead, and immune to sneak attacks, so it just ended up being incredibly disappointing (and annoying).
Only other thing I find genuinely disappointing is the lack of item crafting at all, after it was so good in NWN2, and the lack of enchantments. I'd be fine with unique items getting stronger, exclusive versions of enchantments (like Damaging 3, +3 attributes, etc), as a trade off for the ability to customize a weapon. But it would be nice to be able to craft items with a customized appearance, and some more enchantments to learn and things.
Otherwise the only complaints I have are pretty minor. No one sitting, some things that are randomly pixely and low res when everything else around them isn't, lack of a xaurip companion, that kind of stuff.
(p.s. make a xaurip companion)