They just need to adjust the pricing of small houses in the legacy servers and keep the medium and large house as a gil sink to remove the 1.0 currency.

Phoenix got its first house yesterday and it was Medium size. My FC could buy a small plot at any time but we're saving for a medium one, and we're not exactly one of the biggest FC's on the server.

Regardless, if SE sees that no one is buying houses the prices will be slashed.