Neltharion says to Emberthal:
"And Emberthal, you will wield the essence of the Black Dragonflight to
augment all those around you with my power."
You could make the argument that Paladins heal and so theoretically a tanking evoker, but that cuts into the Paladin playstyle. You mention Emberthal using a weapon. Ok? There are a ton of heroes in this game that we don't specifically play similar to. My response would be that Evokers don't play like any of how the Aspects exactly do combat
anyway, so using Emberthal as a framework IMO wouldn't work. I can see why, but I just don't see the Ranged DPS class taking the one thing that Shamans have been asking for forever.