I have to agree; it's always seem weird to me how those talents don't actually seem to change your character. Especially given how large an impact they're suppose to have stat (Demon needing so many points to unlock) and playstyle (Zombie changing how healing works) wise. The wording is also slightly ambiguous
How many points does Demon require? Exactly one point in pyro, last I checked. Same with Frost King, just with hydrosophist.