My challenge is to find ways to improve my strategy and make better personnal choices. When a game keep throwing at my head that what I choose is NOT an optimal strategy, I don't feel rewarded at all. And that's exactly what BG3 is doing : it forces me to play a suboptimal gameplay if I want a bit of challenge OR embrace the optimal mechanics that will make the game way too easy or repetitive.
That is completely unfair and uninterresting to me.
I want to feel that MY choices are optimal even if yours may be even more. I want MY creativity to be rewarded.
Or in shorter words, the most overpowered things in BG3 in its current state don't actually have anything to do with your character builds (outside of maybe Great Weapon Master, and even then it's mostly the minotaur axes that enables that to be way stronger than usual). Most of the cheese consist of tools available to every single character from level 1. It's why some have the opinion that the classes feel homogenous, the cheese feels like an overwhelming factor in every facet of the game's combat design, and it's going to lead to combat feeling very stagnant later on.
I will keep saying that there may be people that are fine with everything as is, but I absolutely know a lot of people will quickly change their tunes once they realize exactly what all of this spread out over a 80-100+ hour cRPG actually means. Some people have a higher tolerance for this sort of stuff, but I figured out that I don't - I currently have about 60 hours in BG3 and have zero desire to go back to it until there's even a hint that some of the problematic mechanics are being addressed, Bard or Paladin is officially added, or reactions/ready actions are being put in. But I have 600+ hours in DOS2, 50+ hours in Solasta EA, and 250+ hours in WotR Beta, and none of those games have yet to give me the same feeling that something is extremely off with the balance like BG3 already has.
