This is such an interesting card to compare to Heroic Intuition and Combat Training.
All are 3-ER. All provide a +1 buff for a power.
So the difference is a matter of reusability versus versatility.
Heroic Intuition and Combat Training both increase one stat and can increase that stat as many times as you can ready in the turn. Soaring Acrobatics can increase any stat, but only once per round. In decks with a bunch of readies where you're mainly using the one stat, Heroic Intuition and Combat Training are better.
But otherwise, you might get more use out of this. You can use it to increase your ATK one turn, your THW another, or your DEF in a turn where you have to block. If you have aerial allies, you can buff their ATK or THW in a turn where you're stunned, confused or exhausted.
You can't use it multiple times in a turn, but you can use it practically every turn for whatever it is you're doing.
I wouldn't say it's better than Heroic Intuition or Combat Training. But I also wouldn't say it's worse. It just has a different sort of utility.