It's 2013, a proper Queue system and Idle Out mechanic are not some hocus-pocus magic trick. They are standard features that should be put in place to address long term issues. The cycle of World Full->No Queue->Back to Lobby will begin again when they release a heavily advertised expansion or large patch. The adding of servers is a short solution that could be costly if/when the population declines during the course of the game's life.