I agree this would be nice and is likely something they should have thought of. I think it's unlikely to happen. People already want to be able to wear tabards with the costumes as well.
PAWS (Positively Against Wrip-off Stuff) - Say No to Crown Crates!
I'd love too see some more skins, since you cant really edit what your player looks like, skins are the answer.
However there is a lack in them. Not to mention that it be nice to be able to wear your armor over the skin.
But I'm not sure were are going to see anything like that anytime soon, as the crown store is more interested in giving us skimpy beach wear instead!