GamesRadar - Are expansions ruining World of Warcraft?
So how could more content possibly be a bad thing? Well, most complaints we’ve heard seem to stem from the general way MMO expansions tend to funnel a majority of the population into its new areas, rendering old content obsolete. For example, The Burning Crusade provided players with a new level cap of 70, and introduced Outland, giving level 60-plus players a new – but comparatively smaller set of zones to play in. A mass exodus to Outland was partially balanced by the addition of two new races and classes for both Horde and Alliance players. Since both factions had brand new options for starting a new level one Paladin (for the Horde) or a Shaman (for the Alliance), there seemed to be a healthy amount of players to group with on the way to level 60 in “classic” WoW when TBC released.