Add an action that consumes all Aetherflow stacks in exchange for fairy gauge and MP or a nerfed Energy Drain.

Capping on aetherflow and having to blow it on random lustrates feels terrible. At the same time, Yoshi isn't comfortable with the amount of DPS healers were doing in 4.0 which is why I'm assuming energy drain was removed (and also because it caused SCH's heals to have an opportunity cost, which was Damage and MP).

An action that would immediately consume all remaining aetherflow stacks and fill up the fairy gauge would be an improvement, as it doesn't result in pointless overhealing and is effectively the same as pointless overhealing. It also allows you to dump stacks in one go instead of having to weave multiple heals. I think it would be good if this action would also restore MP depending on how many stacks you consumed, to help our MP economy especially in dungeons.

Alternatively, just add Energy Drain back into the game but without the damage component. We just need something to dump stacks on when unused - targeting the tank to lustrate and switching back to the boss is really annoying.

A good example of an action similar to this is MNK's Purification.

I'd also like to mention that if Quickened Aetherflow was still in the game this would be quite fun to use, as the cooldown would go down by multiples of 5 depending on how many stacks you consume, which would require a bit of thought as to how much you can delay using this action before the cooldown reduction would cause you to clip into your next aetherflow cycle.