I'm not sure if this has been suggested, but here it goes.

Provide us with gear with proper stats so that we can nearly full-time pieces without having to do three Sailor Moon-esque full outfit changes every time we want to cast Cure (or whatever you're doing). Such gear would be able to replace plenty of single-use pieces, thus freeing up a significant number of inventory slots.

Most of the content in the game has been knocked on its ass from the super powered armor we get from Adoulin. Certainly having super-de-duper powered armor to rule them all can't be that far of a stretch any more.