What I want from Baldur's Gate 3 is more of what made Baldur's Gate 1 and especially 2 outstanding classics. Which definitely wasn't the story, serviceable at most.
It was the sheer size, scope and variety. The great dungeons, the clean and simple interface, the excellent encounter design and the enormous variety of enemies.
Also, one of the best itemization systems in a RPG to date and a progression system that had a very reasonable, smooth curve of growth (far from some of the absurdities seen in DOS 2).
What I definitely do NOT want from Baldur's Gate 3 is to start taking notes from JRPGs, a subgenre that with very few exceptions has always been the dumb cousin of computer RPGs, with all the focus on the wrong things and sheer negligence for whay I actually love in the genre.