The only subject I've been especially annoyed and vocal on is the Kahga/Arabelle covnersation because it just feels so badly designed while having so much potential to have been done better.
But realistically, I know they're unlikely to do much with it because arranging things like more voice-acting seems unlikely at this stage. Unless that conversation is currently only partially implemented and there's a lot more conversation there already recorded, it feels unlikely to be changed.
Other than that, most of what I have been suggesting I firmly expect the game is too late in development for them to be possible to implement and remain practical. But I suggest anyway just in case.
