Earthquake should be a instant cast non-channeld spell on a 45 second cooldown. Earthquake as is can be serverly overpowered in battlegrounds due to its ability to be spammed, but on the other hand it is worthless in arena. This version makes the shaman have to think of the right time to use the ability instead of spamming it every 10 seconds out of 15 but in return allows him to not have to channel therefore allowing him to still put out damage/CC on targets.
Earthquake as is will make it so elemental shamans are brought into rated bg's to simply spam EQ as much as they can on flags/groups of people and for that it will get nerfed. My way makes the shaman think and use strategy in using his ability but makes it more useful in all points of the game
For Pvers: Glyph of Earthquak- Makes EQ channeld and removes cooldown and knockdown effect