People were promised "something special" for BG3, so far not seeing it.
I actually bought BG 1 & 2 after 100+ hours in BG 3 early access. That's all thanks to BG3.
Finished BG 1, and for sure I had far more fun in BG 3 EA than BG 1. Can't wait to play BG 3 EA again.
BG 2 has very good story (far better than BG 1), but I'm just about half through so far.
But then another Bioware title; The Mass Effect trilogy still remains my best Bioware game, and Star Wars: Knights of the Old Republic a close second.
All I want is a good RPG, mostly a great story, but good graphics are helping a lot as well. And BG 3 it's already more than that.
Those who are unhappy have other expectations, like D&D rules, and they need a rework of current systems or an advanced mod editor early enough; so the community can create enough "fixes" to please an even larger player base. One-time commercial success is easier to achieve, than making a name in the long term. That means winning over more and more players, without losing the core audience.