A bold move, last to suggest something (more) drastic was nine with his forced TMM week.
Has this been considered carefully with enough people? Isn't it safer to have it run on a separate matchmaker? I understood there are 6 slots in the client for matchmakers.
Just FYI arch ran this idea across the ladder team and we agreed that it would be interesting to see how it goes. One week should be plenty a sample size to get an initial reaction, and we will react to feedback accordingly. For example, if there are pouring messages of disdain, we will cut it short; if there is a mix, we will wait to evaluate after the fact; if there is an influx of positive and excited individuals, we may introduce some "map gen months" and keep going.
The map gen feature is only recently something that gained mass popularity, and from my personal experience, am seeing it used more and more lately.