Since you posted here I'm guessing that you want some kind of feedback on your gameplay in premade situations. I hope you don't take this as a personal criticism or think that i'm attacking you but hunter is a little more complicated that you think.
For example, i've noticed that in the last few 10v10s that you stay near your FC a lot to use your
Narrow Escape to peel off any enemies. In a way this is good, however you as a hunter have a much more important role.
If we group classes to what kind role they must fulfill in premade situations, we'll come up with Healers, the obvious, then FC, then mid control classes, like boomkin, brewmaster monk and arms warrior. You as a hunter fall into the 4th group of class, similar to rogues, wind walker monks and rets. By this I mean you are a kind of support class, not just for FC but for team mates and also great at killing EFC.
While the mid control classes do their job of trying to spread AoE and gain mid, you need to be working with the rogues in your team. An example of this would be 2 weeks ago, when your rogue has EFC sapped at ramp and none of his team mates came to help. When the rogue calls out that he sapped EFC, you need to be breaking off from your team and trying to get a kill on EFC with your rogue.
A huge amount of the damage also comes from a hunter, so you should try to get more Agility pieces rather than worrying about stamina. With 3 healers, you're unlikely to die as a ranged DPS, so it would be better to go into an agility set and improve your damage.
My last point would be using your pet's
Roar Of Sacrifice. This is one of the best and most important hunter spells but it's rare to see hunter's use it because most of them don't know about it. I suggest you change your pet's talent to cunning and make a Roar Of Sacrifice macro.
#showtooltip Roar of Sacrifice
/cast [@mouseover,help][@player] Roar of Sacrifice
This macro will allow you to mouseover a friendly target and use this ability so that they don't get critically struck. This is so important to do when you see an offensive push from the other team onto your FC.
Sorry for the long text, hope you find it useful.