
World of Warcraft: Midnight has a huge task ahead of it—fixing the arms race of AddOns by nixing combat-related mods (and thus having to provide its own offerings), installing Player Housing for the first time and, relevant to the problems I'm about to get into, overhauling the transmog system.
For the uninitiated, transmog (sometimes called glamour in other MMOs) is a system that allows players to slap a new appearance over their current gear. In WoW, you used to go to a transmog NPC, create an outfit, and pay a gold fee to throw on your fit. This would essentially overwrite the appearances of those items with the ones you transmogged them to.