I know it's probably too far-fetched an idea, but I was thinking that I would love to have 'costume slots', the same way we have slots for outfits (they would be free hopefully), to use as templates for premade looks with costumes. If these slots could incorprate the categories under 'Appearance', like adornments, skins, etc., it would be even greater. That way we could create a look involving a costume, with accessories, and then save it as a slot, so we could summon the look with one move, as we do with outfit slots.

Reviving this thread as the op makes great points that zos should look at.

@ZOS_GinaBruno