Didn’t you agree on the fact that it should be nerfed yourself (->link)? 
But yeah, the points you make here are nonetheless very valid. Almost half of the current prefixes being dedicated to aether stuff seems both redundant and unfair to builds with other dmg types.
That’s actually the biggest reason I don’t like the new prefix: simple +flat/+%aether dmg bonuses that basically boil down to a global bonus just aren’t truly unique. I mean, those prefixes are goddamn legendary, after all…
So I think they should change a skill in a more meaningful way than a basic “deals more damage”. But this is probably just me whining about flavour stuff right now 