BM hunters are ruining "casuals" PvP experience.

Hunters in general are very strong at the moment yes, but the high number of priest/hunter comps out there in 2v2 can also make them seem a bit stronger than what they actually are, it’s important to look at the overall picture, sometimes a class might seem too strong but when put in a different comp it might look just fine, it’s important to understand that this is a particularly strong synergetic combination that provides amazing crowd control (scatter, trap, fear, mind control, pet fear, web wrap, silencing shot, tendrils).
Anyway rest assured that devs are on to it, Stampede and Blink Strikes are being looked at, and you can probably expect some hotfixes on those two abilities very soon.