Houseflipping can only be penalised if it can be proven in game. If people resort to using 3rd party websites and forums SE is powerless to really do anything about it.

They are adding the new Kugane housing zones. Most of that housing will be sold within 20 minutes of the servers coming up. Don't expect much more than that before 5.0 in 2 years. Its taken them almost 4 years to give us a new housing district.