Kalgan made a post in the Shaman board that they think shamans currently (as of 2.3) are a bit underpowered in pvp, especially in 2v2 and 3v3. They are hoping to buff the class as a whole for pvp. Perhaps the pushback and the NS/EM nerfs were to allow them to buff shammies as a whole (not just elemental) without overpowering ele shamans in 5v5? Who knows? But I am very glad that they are taking steps to help the class in 2v2/3v3 (Unless Kalgan is Lying)

I will take the same attitude to this patch as i have for previous patches that seemed like nerfs: I won't form opinions until 2.4 comes out.