In my opinion, its a waste that the slab shield hax a fixed melee weapon. I’d rather see it take up one slot and allow you to stick whatever you want in the other, while giving you the special move of the actual weapon. For instance, blastoom with slab shield is not an uncommon combo, I’d love to rock that.
It works like this because its move set is an exact 1:1 copy-paste of Kruber’s shield and mace from VT2 and VT1. Anything more would have required more work.