I am always interested when this topic comes up again.

Inventory slots are just that, inventory slots, and in this game it seems they represent the 'whole' of what the player an carry on them in any fashion, be that worn, wielded or packed.

So what the OP wants it just another row of inventory added. Would it matter if it was off to the side or in some newly designed paper doll? The affect is the same; adding inventory slots.