Aero is the mirror image of Cloud 9 for ATK instead of THW. Like Cloud 9, Aero has the unique ability to exhaust for value without using up hit points, turning ally-readying cards like Flight Squadron or Command Team into actual positive value, not just tempo. The problem is Aero requires multiple other characters in play (who can and want to attack) to be effective when she comes down, so she is a bit win-more. Aero has a high value ceiling over the course of many turns, but you only have room for so many of that type of card in your deck, which you may prefer to be a Helicarrier or Avengers Mansion. Ultimately, if you are interested in playing Aero, you are probably trying to play an all-Aerial deck anyways, in which case you don't have too many options, and Aero will play a fine role.