IMO, what is there in Acts 1 and 2 still more than justify BG3’s price tag and glowing reviews. While I wish Act 3 was more polished (and yes, the ending does feel a tad rushed and underwhelming), what is there in Act 3 is still plenty.
I’m hoping for an expansion for an Act 4 to bridge the gap between Act 3 and the ending, maybe set in the Upper City, with better outcomes for our companions. However, with all the branching choices that already exist in the game, simply the feat of having to create one more story might be a nightmare.