The Stormblood teaser site confirms "A fourth residential district" is coming with the new expansion. So uh... sure hope we have the Move feature by then!

It's going to be a gigantic flustercuck even if we do have the Move feature, as everyone and their mother tries to get into the fancy new wards. I can't imagine how bad it will be when FCs are desperately trying to clear out their old houses but somebody still has a chocobo in the stables or a flower pot in their FC room.