what interview hinted at it beeing more than PHB?
https://www.google.com/amp/s/wccftech.com/larian-studios-interview-innovating-baldurs-gate-3/amp/Q: Regarding classes, are you going to strictly include only what D&D features or do you have the freedom to do something a bit more unique?
A: When you start the game, we want you to feel that you’re playing Dungeon and Dragons. So it has to feel familiar, you have to be able to pick the race and class you like. We do have the freedom to do what we like, but there’s already a lot in D&D that’s been added over the years and a lot of this is going to be in there.
A lot of the class stuff added over the years mostly means subclasses and some spells.