My theory on hunter gameplay is coming together. The BM hunter will be heavily reliant on Steady Shots and a rotation of snares/cc/pet abilities to get an effective kiting strategy. Worgen and goblins will pull this off most effectively. Alternatively, they can pick a pet that is effective against casters without regard to cc dr to provide interrupts against casting. Tauren, Belves and to an extent, Nelves can compliment this approach. Talents will compliment survivability and pet damage some. A troll is also good for an extra focus regen. This is the spec to stack haste for since you are entirely reliant on focus regen to pvp at 19.
Marksmanship Hunters will have aimed shot, a huge game changer when you can use it... a hunter would effectively deal 800% weapon damage and then some in 4 seconds between two autoshots and two aimed shots. The problem is they'll be vulnerable while they work to regen focus. A stun pet is a good pet for complimenting the aimed shot in addition to compensating for the focus weakness by allowing a free 2 steady shots/36 focus regen in addition to the 12 focus regenned during the second aimed shot, you can time it during the first aimed shot to interrupt a healer and allow you to get two aimed shots on a target without a heal landing between the hits. If you have a mage, BM or lock to cover for you, you can get away with a wolf pet for dramatic increases in damage. Orcs compliment the damage best while nightelves and trolls have a cooldown that do the best for gaining an openning to get the two steady shots.
The SV hunters explosive shot deals impressive damage over 2 seconds and an initial hit, all as fire damage. 50 focus and a cooldown. It will be more impressive under pressure and in pursuits or vs high armor than MM is... but less in a static battle or lighter armored targets.