I think making accessories as custom user-created items would have worked out better than shoes.
Shoes will (most likely) be allowed everywhere, full time being worn on character. Thats not so bad other than the fact only a portion of shoes are actually shoes and most are hats or other items, some being obviously recreations of existing items and rares.
If they were accessories, they would show up ingame only once you equip the item where it is obvious you are holding it as an item and would cause no or at least less problems

I mean I arleady make accessories for Brickplanet, but yeah I would LOVE to have an UGC accessories and hats making feature, the satisfaction is different