At the end of act 3 with the
option to turn yourself into a mindflayer, the fact it's treated as a shapechange and changes your ability scores sucks so much, not to mention there isn't animations for half of the weapons, I get mind flayers are powerful and all, but if I spent 99% of the game playing a monk and punching people, the fact I end up with the tentacle slap, no dex, no str and no con is a bit of a kick in the teeth as most of my build is now just meh. additionally It would be fun (though not lore friendly or make too much sense in the story but yknow) to play as a mindflayer from the start in subsequent playthroughs, or NG+ or something, I was looking forward to the opportunity to play a mindflayer the entire game and then only got about an hour max with it was disheartening, don't get me wrong, I loved every second of it and the game was awesome minus a few bugs that didn't change much but currently even modding doesn't help here as you get all the strengths of the illithids including the ability scores, having to re-unlock all those powers and just having weak versions or not even that would be a different and interesting experience, similar to dark urge but less inherently evil and more malleable in a weird way.