I think that enhance is an awesome spec with a lot of power... and yet I've only fought 2enhancement shamans this season. How come there are no enhance shamans in arena, do they have some hidden fatal flaw:(?
Low Stam for a melee, only two defensive CD's, one of which is subpar to almost any other defensive CD, and the other one's a 3 min CD. The really powerful advantages we bring, are heroism without a Shaman healer and Earthen Power giving a freedom like effect. The Heroism works better with a Shaman healer providing it, and another DPS having a different CD to blow in conjunction. Most classes have their own tools to counter/break/avoid snares, rendering Earthen Power weaker then it initially seems.
Other then that, according to the public opinion, we can't kill anything outside of Heroism/Wolves. I don't agree, but you won't see many EnhShaman in arena's if that's what people think of them.