I think Elementals have the best mobility of all ranged spellcasters, so this will probably be nerfed. As it is now, I beat out all ranged dps except Hunters on Heroic Garrosh boss damage as I can always be casting during the high movement phases of the fight. I expect them to remove it and then try to band-aid with some paltry buff to Lightning Bolt again (10% more damage!).