Originally Posted by
Garian
The game is balanced with flavor of the month cycles. That is, Blizz make something deliberately OP every new season or expansion based on the number of people playing a particular class.
So if a class or spec becomes overpopulated, Blizz will nerf it to hell or literally let it die, like they did with rogues in MOP, to cull the population and encourage players to reroll.
Plus WoW is nothing more than a glorified game of rock/papper/scissors. It just happens to be really smooth. And the art is awesome. But WoW revolves around PVE really.