The most important thing you need to master is the art of backpedaling as only then can you make truly skilled players mad with your constant barrage of 40k arcane shots / 100+k kill commands while you're slowly and carefully taking step after step backwards, allowing the delusion of skill to slowly make you happy. Once that's done, you'll reach the zen of hunter potential and never have to fear again.
If you wish to master it further, remember the following:
Save both deterrences for when your team is dead and you only have 10% health left, that way you lose the game but you also slowly kill your enemies by wasting 10 seconds of their life.
A point in Narrow Escape will fix your one weakness: having a dead zo-.. Having no escap-.. Having no defensi-.. Having no cc-... Err... Having to rely on so few things to keep you alive.
Spec into wyvern sting and forget you ever had to use precision and skill to land freezing trap.
Fervor is for tryhards who actually want to rely on their player capacity to manage their focus. You're a hunter, so always spec into dire beast because your job is creating a clusterf*ck on the battlefield so that no one can click you!
***
/sarcasm and /frustration. I hate hunters in MoP.
That said,
have the armory of highest rated hunter in the world.