I don't mind an interrupted cast if I know I'm going to reliably make it out of an AoE. And that's really what it's coming down to. I use this ability rarely due to having to switch between a party member and the boss, which you've already said can be rather clunky, at least when using keyboard/mouse. I've never used controller but it might be easier on there to rapidly switch targets, and not just any target, a target you know will be safe! This could just be a personal thing though, I definitely don't have the muscle memory built up on selecting a target and hitting Aetherial Manipulation. But that being said, I'd settle for also having enemy targets available to teleport to. Also from my personal experience, I find that when I do want to use Aetherial Manipulation it's when I'm too far out and want to get closer in.

Honestly, I just want to get the most out of this ability with it being a low recast time now. Making it a bit more of a skill that can be used as a reflex over having to plan ahead, which I feel Black Mages have to do a lot of already.