Yesterday I was watching a Twitch stream; a resto druid playing 3v3 rated arenas with a frostmage and an elemental shaman. They played from 2880 rating up to 2968 with an MMR of over 3000 (at the end). Looking at his highlights from older games, he also played some tournament qualification games with a warrior and - again - an elemental shaman, fighting against holypally-DK-eleshammy.
I never ever knew or would have believed that elemental could be a thing in PVP in this expansion.
The comp's strength seems to be the shaman's offhealing and relatively steady damage output.
Has any of you ever seen an elemental shaman in arena, or even played it?