Concept 1: Housing based on school— each player would have the ability to purchase, with gold, a house on the WC street that corresponds to their school. You would be able to access it from the respective street. It would only be purchasable for those in that particular school. Balance would be the exception, as they don't have their own street, so perhaps in the Commons, Olde Town, or the shopping district for them.
Concept 2: world housing. There are already world-themed houses, but what if we had houses that were actually in those worlds and accessible from those worlds. Almost all worlds have some type of town-like are where we could "purchase a home," should this feature ever be added. It would be an interesting mix up on housing! (an example would be the housing in Mirage that you can enter from the streets of the city.)