No one here approached dispel mechanics with the idea that PvP takes precedence over PvE, so there's little reason to object in that regard. The changes to class systems in Cataclysm we've announced thus far are being proposed to make the game better, both in terms of PvP and PvE. Mind you, we have a host of changes planned for every class we plan to share in the future. Before providing overviews of our goals for each class though, we wanted to give you a look at some changes to more broad systems.
While the feedback is welcomed, I'd caution players to consider this information with an open mind, rather than directly translating the proposed changes into the class systems of Wrath of the Lich King.