I've seen the little accessories you can get for 2 handed weapons called grips; which give only minor boosts to your character but can come in handy from time to time. Then one time, I wondered about the empty offhand slot we have. Sure we are holding 2 weapons (2 fists) but then again a Great Sword requires 2 hands but can equip a grip on top of that.
From that, I demand an offhand accessory for Hand-to-hand weapons
Seeing this would be a start: