Ok, let me drop some INFO into all of you.
Solo, Hunters are not great, since Wrath, when they could do insane damage even past Resil etc.
Now, and at the 70s, they can't go 1 v World, not with the amount of mages and rogues etc running around, BUT don't get this wrong, hunters are great, given the player has a great understand of his class and others, and knowing how to kite them, some classes need to be kited a different way, such as, Rogues need to be kited in a Zig Zag, or Up and down kept around a Frost Trap Zone with flare kept down about 100%, etc, Kiting casters is a bit different, Dipping in and out of Range, always on the go away unless you can do it near an LoS, ETC.
In arena, they do a LOT better with a healer, and one that can dispel slows etc. Since Traps can cover a NICE large zone of the maps and makes kiting a bit easier, and with the way maps are laid out allow for Disengage not only to get away but for kills or into LoS or basically 1/2 across the maps if you have a Parachute cloak enchant.
Main points to remember.
Healers turn you into a beast, and if you run with a Priest and a Paladin freedom + bubbles are insane, and you will be able to control the hell out of a BG.
In arena the CC chains from a Trap into a HoJ or a Fear is great, Although shaman is still a strong healer you wont win via CC Chains and more outlasting.