Unsure how you can review 2/3rds of the first act in an early access game tbh. Game reviews by individual gamers are too subjective a sample base anyway, they may be FPS gamers like overwatch which got 10/10/10 across the board and is a game I absolutely hate with a passion.
I don't even care if games get "very positive"on steam etc. I read many reviews and alot of the time the dislikes are petty. You have to separate the fanbois from the cynics. Even though I have many issues on the BG3 subject the game is "as standalone game" well made, fun and involved. If 2/3rds of the first act gains a 7/10 then I would scratch than down to a win in my book.