Well if P2P gets PvP power enchants for every piece of gear do you not think that would be OP? There's a reason why some 24s like the parachute cloak for any class despite it only giving agility; it's because it can be enchanted with PvP power, which is otherwise not available to our bracket.
Hunters are already too OP lets look at their buffs, as well as the nerfs to healing and resilience, shall we?
Patch 5.0: Battle Fatigue got added, which nerfs heals by 15%, and 40% base resilience was implemented.
Patch 5.1: Steady Shot can be cast on the move, Battle Fatigue got buffed to 30%.
Patch 5.2: Aimed Shot got a 0.4 second reduced cast time and a 10% damage buff, and Explosive shot got a 10% damage buff.
Patch 5.3: Aspect of the Hawk got buffed to 25%, up from 15%, Arcane shot and Steady Shot got a 10% damage buff, Battle Fatigue got buffed to 45%, which is more resilience than we can even get since resilience from honor heirlooms is now about 60% less effective.
Patch 5.4: Arcane Shot is going to get a 50% focus cost and damage increase, which is more burst, level 22 and up hunters are getting Counter Shot, which is a ranged interrupt, and disengage is getting it's cooldown reduced by 5 seconds.
Thankfully BM hunters lost their Intimidation stun, and it looks like Explosive Shot is getting a 30% damage nerf, but it won't matter that much.