The moment i was just start reading CRB of Pathfinder 2e, one of thought immediately came was: "Well damn. If only 2e was released few years back, Larian would immediately pick it instead of D&D 5e, taking how close it is to DOS 1,2, and overall easier port as CRPG".
Now it's of course imposible making such changes. They making specifically BG game, and started it as based on 5e. There is no turning back at this point.

Though maybe their next game...