I agree that to know some roadmap would help A LOT.
Larian has internal roadmaps for development, however from a player PoV, Early Access is and always will be only Act 1. A road map for a typical early access game where the full game is released incrementally, a road map makes sense for a release schedule and general idea of where things are going. However, a road map for BG3 would look something like...
But as far as feedback on forums go, doesn't really make much difference for what kind of feedback or mannerisms we hold here, does it?
Is that hypothetical details though?...Do you know something we don't?! Next class to be released will be Monk! There, The Composer said it, and I will hold it as truth! (No, I'm not being serious )