Dear god.
Can you imagine how many people would forsake all of the regular
cards, take up this only alongside Animate Weapon, and just abuse the HELL out of endless 'dual-weapon/shield' combos?
I also think that having so many shields out would invent a new deck; 'Universal Rainbow Weapon/Shield-loving Multiplier'.
I think that having more slots is lovely, but multiple shields and/or weapons (
up to 8?!) is a just being ridiculous, and potentially hard to program if you already have multiple weapons out (what would happen if you filled all 7 weapon slots and tried to add a new one/used Animate Weapon when you have 7 weapons out?).
This also doesn't help Air's weakness to permanent control either, and would actually give False Gods/other control decks more of a reason to use those permanent destroyers. (Unless you had 6 PA's...)