I just want to say as a hardcore PvPer: We did it cause we enjoyed it, not because of XP. We'd have still played because we enjoy it even if XP wasn't given. You've got to understand until 4.0 PvP was a bit of a dead end endgame activity as far as progression was concerned. And the community that formed around it treated our leveling and PvP as 2 separate things.

It sucks that numbers will perhaps drop off and queues may become longer, but if you tried it and like it, keep queueing. At least now you GET XP. Don't do it purely for leveling. Run your dungeons, run PotD, do FATEs; get all the leveling done that you want to. But when you wanna compete against other players for fun, leave your level at the door, and give it your all.