I find this really unnecessary.

...It's a cute idea and such, but still. No. :l
Not only is this a drain on inventory spaces, fashion isn't really the focus of this game [except for Brygid], and trying to make it such is a bad idea, I would say. I mean, sure, whenever I'm not fighting, I switch out to my Wonder Maillot/Trousers, and use Treat Staff II outside of fighting, but that doesn't mean I need "Vanity slots".

I think we should focus on more important things overall.

PS: This is just my opinion, that is all.