Well that's a really close minded statement. I play CS just about as much as I play arena, they're not mutually exclusive, it's a completely different game (o'rly) and both have a completely different appeal. Whether or not PvP changes should or not affect PvE is debatable, although I think most rational people will say no, but you can't really do much about it. No point throwing a fit and trying to marginalize people who enjoy different aspects of the game just because they certain specs less appealing (which isn't even much of a valid argument in MoP seeing as pretty much every single spec can perform at high end PvE).