Well, there isnt a whole lot you can do. The developers have implemented began their new method of dealing with housing so we can wait and see, try to find a housing mega thread to state your concerns and hope one of them sees it.

Other than that, do your best to enjoy the game. They are introducing some new houses with Ishgard in 6.1 I think. As far as 1 player owning multiple houses, I'm of the firm belief, if you own multiple accounts, each one is just as entitled to own a house as your "main", and all issues of shortages or supply and demand are SOLELY on said development team and 0% anyone else's. And yes there are people who take this to an extremely disrespectful extreme and fight against the spirit of the game but that's just how its been going.