Isn't this ability that they said they had to tone back because it was so overpowered?

Um.... can someone help explain to me how this is at all the case?

From what I can see it's at best an "ohshit!" button if you're out of aether and you need it now. So badly that you're willing to give up the considerable healing that comes from your fairy.

Especially since the abilities you would use with those aetherflow stacks aren't even affected by the potency buff....