Gyrofalcon: BG3 is released in Early Access state, so call it Beta if you like. And Larian Studios has deliberately chosen Act 1 and "Classic" difficulty in EA, to not have to deal with balancing issues across difficulties now in the beginning.
Skrofler: I see. I was looking at the store page and didn't see a big red sticker saying it's in development. I guess you have to know where to look.
From what I have understood hopefully full game release is maybe towards end of 2021 likely unless it is postponed to year 2022.
In addition I believe it will have 3 main chapters this is the first chapter.
Furthermore I believe their goal is set max level to about level 10 for full release. An expansion could of course increase max level later.