JoeGKushner
Adventurer
Basically what I think could work would be a system that is, at its core, based around skill points and feats. You automatically get a bit of attack bonus, save bonus, and maybe AC bonus per level -- the so-called "Dude Factor," where even weaklings know a bit about being cool if they're high enough level.
But for many things, there shouldn't be a "Dude Factor". Having things like attack, save, and AC go up automatically means that even the mage will eventually be better than a low level fighter and unless it uses a seperate system for NPCs, we'd have the same problem for experts that we do today in terms of them being able to take and potetentially dish out a lot of damage bsed on merely the "Dude Factor".