I just had a thought, literally a few seconds ago. I didn't think of it too mutch or anything so it's probably very flawed but I wanted to leave it there nonetheless.
What if the ele had auras permanently, depending on their attunement? Of course these auras would need some tuning (shock and magnetic auras, mainly). The aura detonation skills would consume these auras and disable them for the duration of the cooldown. It would give more personnality and specific niches to each attunement, make detonation skills feel less clunky and better integrated in the overall gameplay... And it would be a big buff to the core ele, without increasing the DPS output. In others words, it would be a significant buff which has been asked for a long time, but wouldn't make the ele overpowered in raids and fractals.
Also their particle effects would need to be tuned down and disabled when out of combat.