Firstly my comments should be taken as coming from someone who has only ever solo played a hunter, and that was pre wotlk. (I have recently been running two hunters in amongst others but that isn't pvp either).

I had a macro that basically did raptor strike, mongoose bite, wing clip at the same time, the wing clip allowed me to get to run through them and get to range. obviously it was easier being able to do 180 degree jump shots to whack concussive on them and to kite, but the wing clip might help. (although I don't think warriors had bladestorm back then.

Also,cant you use the disengage ability. You can't round robin this but it would shoot your hunters back well out of melee range and allow you to whack concussive on etc. Not sure what the cooldown is on it, but I've certainly seen it used a couple of times in quick succession by hunters in arena (possibly a preparation type ability in survival tree).