I've seen a lot of classes VERY often and VERY long on the top of the food chain. Not shaman. Once, in MoP, enh had it's first brief visit. Balance involves more than "Once in ten years, you get to feel great with the numbers you put out."
I'm not even asking for top dog. With the great flux of dmg performance in WoD, you can be absolutely killing the meters in a certain scenario, and in the next, adifferent class/spec leaves you in the dust. Yet, afaik, even in sustained dmg, enh wont leave anyone in the dust, only competitive. Again, there's no balance.
And dont forget how WoD started off either. How enh was treated in WoD beta speaks volumes.
And their awesome solution to our scaling problems...yay, SS and LL buffed again...