I'm all for promoting other maps and helping grow the population of those who enjoy playing said maps. However, I think this could be accomplished by something like a double merit week or weekend for one map. That way people can continue to queue for the maps they may prefer, but can receive an added bonus if they venture out into the map being promoted instead. Removing options from folks and telling them "NO! YOU HAVE TO PLAY THIS INSTEAD!" is not the best approach, IMO.
And I know I could just get nine other folks together and do a custom game, but I'm too lazy to do that. I think most other people would be, too.