That's all true, sure, but Air2 is garbage.
I used one once while assisting with an open water class and managed to put my snorkel in my mouth when demonstrating an out of air exchange instead of the Air2 because they were right on top of each other and I wasn't used to that. I made sure that will never happen again by never using an Air2 again, even if it does mean putting my own reg in the chlorinated pool water.
I've also never been a fan of jacket BCs. They don't ever fit me well and tend to ride up at the surface. I thought the issue was not having a crotch strap, but my back-inflate Stiletto doesn't have one and I like it just as much as I like my BP/W. (
maybe more...sacrilege!)
I have friends who dive with Air2 on a jacket BC and seem to like it.