For weapons anyways... Increase the effects of attack rating and decrease the effects of what weapon you're actually using. This would make your attacks more reliant on the character vs the actual weapon. It would be a boost for ma's, it would decrease the effectiveness of those massively overquiped shotguns, trader debuffs would be increased in effectivness against weapon users, and a trader would benifit from the skill stolen. Or do this to coincide with an overquiping nerf to boost everyones attacks somewhat.
I dunno, just an idea, flame away.