Technically they can lock any content they want and redistribute it at any given time. Like they do with the iron banner and the Queens wrath. They could lock all content and only release a few things here and there each week. It's their game their rules. Don't have to like it, don't have to agree with it. I understand it. Just don't care for the tactic, but alot of games are going the way of dlc's and expanded game play.