As a hunter I am not able to kill healers on my own. No interrupts, pretty much a monkey stun and 10% healing debuff are my only options as survival besides just pumping out the damage. I think a hunter interrupt is needed. Even silencing shot for marksman is useful, but again 1 on 1, it doesn't seem like 3 seconds of silence every 20 is enough to put out much pressure. The more I think about it the more I am getting the feeling that hunters are completely a support role in pvp these days, stand back, nuke stuff with non-stop decent damage, throw out some traps and wyvern sting, slow people down, but really it takes something else to actually kill stuff if there is a healer around.
Can anything beat a healer 1 on 1 right now? Warriors and rogues having a hard time without their MS too? Seems like mana burn/drain mana would be the best bet at this point to get healers if you are alone.