three OOO should add to the game dual weapon upgrade to buy from boost to dual wield weapons. it would work by making the knight hold the first weapon in his left hand and second in his right hand with its shield attached to the arm. the way the knight would change weapons would to use change to previous weapon to change the first weapon and next weapon to change the second weapon.
the way attacking would work would be to make it so that when your knight attacks they either use both swords at the same time or do the second sword shortly after the first. and charge attacks would work like normal attacks, at the same time or one after the other.
You have no idea how times this has come up, and the same basic problem is how to handle defense.