Sounds like a good idea, if you're gonna put something in the game as stupid as dual wielding you might as well go all out.
Wrong wrong wrong wrong wrong. Dual wielding is not stupid, it is a valid form of melee combat. Dual wielding weapons which require two hands to use IS stupid. Did I mention you were wrong?
Also, even if your miraculous character had the strength to carry a two handed weapon in one hand, it would be unbalanced (by which I mean too powerful, not actual balance) Perks for two-handers will be like "Critical Stike" "Shield Smasher"