Just for some perspective...
The ONLY reason that enhancement is a forced DW spec is because of PvP whine. Apparently, casters didn't like getting killed in one hit from a WF 2h at level 60. So, in typical Blizzard fashion they nerfed the hell out of shamans instead of realizing there was a problem with casters when they were dieing in one hit. 20 levels later, casters still die in one to two hits in many cases, but its from even more classes. But hell, at least those nasty shamans will never use a 2h again.