Honestly, the justification of SE about server limitation is just stupid.

more subscribers = more people wanting houses
more subscribers = more money
more money SHOULD equate to server upgrades

They're getting increased revenues but don't want to give it back to subscribers. Owning a house and the server load that comes with it should already be part of what you're paying to them.

If a change is needed, I'd go for limiting a single house for a single account and not on a per character basis.