Taking on cheesy opponents doesn't sound un-fun, but I understand that it can be a crutch in making difficult encounters at higher-levels. I think the bigger problem is just how much less fun D&D gets at higher levels, 5e too, but especially 3.5 where your power set is such that it's difficult to come up with enemies that aren't, for instance, gods and demons, or extraplanar entities who warp reality...roll to attack the concept of entropy.
I've reached the point where quests are too bugged to continue, and compared to where that was for me in Kingmaker, Owlcat has improved by leaps and miles, but I don't think people should just discount how a game is unplayable because the maker is on the ball trying to fix it.
