I think it’d be nice if when you advance futher in a class other than chosing a new one, you get a few extra changes is the visual appearance to give you the sense of progression, rather than keeping that novice look of the base classes… ( think of… Ragnarok Online transclass maybe, but adding trinkets would be better than merely changing colors ).
Anyhow, It’s just an ideia, it seems a little unnecessary, but it’s pretty cool for the players, principally when you go cleric 3rd circle.