I'm definitely turning experience off, with my Shock/Exorcism team.
Just need to get a bit more frustrated with arena on the DK's, and switch teams again.

But if you don't mind the wait... queues aren't terribly slow.
Turn off experience in a bracket that you destroy in.
Your gear will eventually cap for your level.
If you're 70th or 80th, there is even pvp gear for honor.