1st problem is insane burst. Honestly, the damage that can be put in a short period of time is really high.
2nd problem is somewhat ability to survive. Shaman in ele doesn't have any button to press in order to save him self from being blown away, but thats okey, since pvp is team work.
I also dislike changes on the purge spell and earth shield, because before earth shield was really like a protection from dispelling stuff. That was rather unbalanced, though, but still we face some other classes, like druids and priests, who are quite hard to dispell, because of various stacking up things. Do you plan to reduce mana cost of purge?
Now it will be easier for me to just for example blow away a shield, rather than trying to dispell all the buffs, present on target, so in my opinion this takes away variety, pushing elemental into being just a turret.
I agree, there is a lot of utility in managing totems, like earthbind and stoneclaw and tremor and all other, but having tremor totem redesigned eases the use of it significantly. Now shaman doesn't have to watch for it, it becomes just like a second pvp-trinket against fear, charm and sleep.
What I would like to see, is probably introducing some way to avoid be blown away, some defensive cooldown.
Probably a nerf to either lava burst or elemental mastery, because elemental mastery is way above any other classes' burning cooldowns. Probably you could make something out of clearcasting, to make critical strike rating more attractive for shamans in pve.
And I also can't understand why some other classes, like magi and warlocks get 5% increased damage or 5% reduced casting time for getting 4/5 pvp set and shamans end up with restoration set bonus.
Don't you judge me.