It seems like the expiration date is keeping a lot of players from rolling these seasonal races. I know that most people delete in a much shorter time, but keep in mind alot of people roll throw away char, quick experiments, etc. Also most people when they roll a character want to think it's going to be a game changer that age dies, and an expiration date kills that dream and so they don't bother. Of course it's not true but perception is reality. I think these char won't pick up steam until that gets changed.
Also Centaurs look cool, but the Vuln_Climb, Vuln_Crawl, Vuln_Boat is really rough.

That which does not kill us,
makes us stronger.