Howdy,
I have been wondering if this will ever come in place; however, I would enjoy seeing a costume pack that allows players with characters that have wings or tails to conceal, fold, or wrap them to prevent them from being a ginormous obstruction in social environments. The wings can extend back out with flight based powers; however, I just think it would be cool to see a character fold his/her/its wings like so.
As for the tails, just simply have them wrapped around the waist like Saiyans did in the early life of Dragon Ball Z. Like so:
Again, this is just something I would like to see introduced into the game since now we can alter the size of the tails and wings. Since these are just applied to the wings and tails I wouldn't recommend that they be INSANELY expensive nor make them the same price as a new costume pack since it isn't introducing anything but rather offering alternatives to how one wears the wings and/or tails.