Alright, so they've updated this thread (
http://www.smashboards.com/showthread.php?t=209846) to include the frame information for all the air releases.
As it turns out, everyone's air release lasts a whopping 50 frames.
With the break animations for the GRABBERS all presumably ending at 30 frames (still waiting for those numbers), I think we all start to see why there are so many problems with the air releases.
So what's interesting here is that Wario's air release is as long as everyone else's - 50 frames. Wario's problem is that he barely moves away from the grabber. So they can all move much sooner than he can, and don't even have to waste many frames reaching him since he's literally right there.
Yoshi's release chain is also explained, since he's free to move a whopping 20 frames before his opponents and, if they fall fast enough, he can grab them again or hyphen smash them before the opponent's 50 frames are up.
The solution? Also a universal value for the grab release. Specifically, an across the board reduction down to 30 frames, the same as the grab break animation for the grabbers.
What we need in summary is:
1) Universal grab BREAK time - for the grabbers - of 30 frames (removes Bowser's grab release chains/infinites)
2) Universal ground grab release time - for the escapers - of 30 frames (removes Marth's infinites)
3) Universal air grab release time - for the escapers - of 30 frames (removes Yoshi's release chains and prevents Wario from being taken advantage of by letting him move soon enough to react defensively)
I really hope those won't take up too many lines... I also hope they're possible...