Didn't Hunter's have a binding shot of some kind? I seem to remember them having a slowing effect...

If you could do so, you could kite another person with relative ease, ESPECIALLY if you put on 'Aspect of the Cheetah'. A lot of the 'Magical' shots you can use are able to be used on the move, if I remember correctly as well. They might have been bugged though, as if you cast it in between regular shots, it never delayed any regular shots/etc...

Hunters can likely be a force in PvP, you just can't rely on people focusing on your pet...