I admit that I'm pretty excited about it, but my only issue is that you're going to have to get the shamans into "the thick of it" in order to drop those totems down where they can AoE monsters. Not a huge deal, but if you like keeping some distance between your shamans and the tank, it could cause problems. Especially with Magma totem, given the short duration of it.

But still a major buff (with the possible exception of PvP stuns)

It will be nice to have some AoE for trash, though, since DPS meters get so inflated by it. When I'm running Arlassa on group runs, her DPS is always low up until we get to bosses, when she outshines all those AoE spamming hunters and druids. hehe. I love Shaman single-target DPS, but this will be a lovely addition.