Oh, I'm pretty sure that I'm going to have a bunch of affected items that I'll discover sometime after patch day. I didn't really expect to have a white item that's not transmoggable (and thus not part of the wardrobe system) to end up as collateral damage though.
Maybe I need to keep tabs on the starter shirts too since those also getting moved into collections and might also be items Blizzard wants to make sure stick to their 'intended' races.