I don't see the point. It just seems like a more inconvenient way to introduce new and returning players to the game.
It's about creating that moment in time for new players (or returning players on the fence) to jump in to, similar to what expansions do for other MMOs like WoW.
Also, it should benefit new players to have those early- and mid-game areas more densely populated with like-minded players at similar points of progression, where many of those areas are pretty sparsely populated in the main game.