Most classes get an archetype at level 3 which is huge.
There’s a lot more than that, you probably just don’t notice this because you’re not familiar with the system.
I played as a fighter and as rogue, but didn't feel all that different. I think a big part of it is that it isn't a system I'm familiar with like you said. Hopefully I'll get used to it more with time.
I'd really like to see at least to 11. Level 9 spells would be...a lot to make work within a videogame.
Yeah I've been trying to read some of what comes with higher levels and later spells seem.. too much for a video game to capture.