This is something that just came to mind....
Probably a bad idea but here goes nothing
Dual Weild as we saw in SAO was awarded for top attack speed.
But what if I took my character towards versatility?
Starting from a low level Kingetsu swaps frantically (maybe wrong word) between claw and sword. Gaining him later on the skill to use one of each. This would combine strong claw attacks with swift sword atacks.
Thus I don't step on anyone's toes. Only thing that would impede this other than your ruling is whether its possible to swap equips in combat.

Aye sir no unarmed combat