Honestly, it seems they will handle the story, decision making tree and characters interactions very well. I don't have any concern in that regards.
My concern is with gameplay mechanics and immersion. DOS 2 exploration is terrible, the scenarios and enemies are very repetitive, there are no proper cities, no day/night cycle and as somebody said the UI is very "gamey" with excessive visual effects.
Immersion is one of the key supporting features for enjoying a RPG and its story and I hope they fix it for BG3.
