A small, although very annoying issue: When you win, you don't get to keep any of the parts you unlocked during that game. That hurts the completionist in me very much.
I think a clear all button for decorating would be helpful, since most of the time I just put all pieces of one type into the lobby and replace them with a different theme when they run out of freshness. Not having to manually drag every item out would help with that.
 "Super Mega Ultra Battle Robot 2.0"){kind=icon}
 "Papa's Hot Doggeria"){kind=icon}
okay, will fix that ASAP!