Resto Shaman has not changed a whole lot since the end of BC and even then we just lost spell ranks.
Since I do not raid or really play much anymore outside of questing/raid finder when I have some time I chose Ardenweald because I liked the mount. However, today I was reading the change notes and looked at Primordial wave more and realized that it was far better than I initially thought and will likely pick it on Live.
Shaman without Chain Heal just does not sound right, they might nerf it into the ground but I do not think they will remove it. That would be like removing Chain Lighting.