WHY CAN"T I DUAL WIELD GRILLED LEEKS!?!?
Because this isn't Pokemon.

(yes, there's a 'mon that actually uses a Leek as a weapon)
I'm not sure how they could get this to work properly with the bash mechanics, but I'm guessing it would be at the cost of someone using only one shield taking a goodly hit to bash efficacy, and I wouldn't want to see that happen. Now, if they could do it without that I'd be all for it, and it might actually get me to make a shield-user instead of a 2H-wielder for a melee character for a change.