Also I really think this would be more of a hassle than it would be a benefit. Assuming you did relinquish it after 9 months, how much would that actually effect? Would opening a few plots really be worth it? Do we really think that in these time frames SE cannot get better servers?

I do not think there would be as much of a mass-exodus relinquishing benefit as some people have in mind. It would maybe be two or three houses in each residential area (mist, LB, and goblet) every 9 months, which would get bought up near-instantly and lock those plots out for another 9 months. There will not be a constant rolling over of houses every day for your picking and choosing.

This is not the solution. Better servers for housing, and dynamic wards, are the solution.