My only issue with the cut content is they promoted it and then said nothing about removing it, that's shady. If they had been more forthcoming about the change considering they told us it was in the game just weeks or months prior then I don't think anyone would have the right to be upset. They very well may have delayed the release too if it wasn't for Starfield.
I've never understood the fixation with that game, it's a Bethesda game there's literally memes about bugs and bethesda lol, that game will launch with more bugs than act 3 could only concieve in it's dreams despite what Microsoft says. I would of just delayed BG3's release for another 2-3 months and had the cut stuff that makes sense like Ethel's coven, Avernus, Upper City and the companion dialogues and epilogues put in.