Subclass specific quest lines that also increase power.

I mean like, when you use slash blast on a mob, the damage goes
2500 -> 2100 -> 1700 -> 1100 -> 800 -> 400 it weakens after every monster it hits.

instead of that crappy formula, it'd be like 1700s all around for even distribution.

No it doesn't. Unless you have FA, which you shouldn't. And even then only on the FA part.