The ever eloquent Tobold posted something quote worthy yesterday:

"But while we could discuss class balance in PvP endlessly, in the end it all sounds like the rock complaining that he always loses against paper in a game of rock-paper-scissors."

Class-based combat, whether it's WoW, Team Fortress or Tribes, is always best balanced in rock-paper-scissors style. That's the basis of the design. PvE requires more complexity in the design, whereas PvP is lent plenty of diversity by the human vs. human element.

As a PvE player, I'm selfishly irked over Blizzard's constant PvP-related rebalancing of the classes and how it alters the rest of the game. My impression is they appease a population that doesn't get it: some classes should be your bane.

Accept it. Play the class you enjoy most, to the best of your abilities. If you have problems with class balance in PvP, it's probably PEBKAC.