I wish you could buy outfit pieces individually. I have no desire for any of the costumes on the mog station, but I do like a lot of the pieces. Easiest solution would be keep the costume packs as is, and then have a break-down menu. Obviously this would have buying the whole pack be less expensive as buying each piece on their own, but you could just get that top you really like and not have the other 4 pieces collect dust on a retainer.