In defense of the shaman AoE design: I know we would all love a 1 button "I win at AoE" spell but I don´t think we need it. At least as enhacement I kind of like the way our AoE works. Do we make strong burst AoE like mages and hunters? no but our long term AoE is pretty strong and that fills a niche as much as the quick burst one does.
I think this desire for dot spreading aoe damage comes frome looking at other classes numbers after an AoE pull and thinking that they won over us or something like that. So what if Surv hunters press a button and boom they aoe like mad men. Thats theyr thing, let em be and be smart enough to understand that the people that spam dmg metters after killing a bunch of trash mobs on the way to a boss fight are compensating for their lack of performance in other areas