I've seen Jonas listed at 7'2"...nonetheless, he is much thicker than Ayton and though not as athletic, Jonas is remarkably so for a man of his size.
And for the record, I DO think the rebounding discrepancies are a "problem!" A HUGE problem to be clear... I just don't put all of that problem at the feet of Ayton. In a huge amount of instances, Ayton is guarding a man away from the basket (I'm not talking about at the 3-point line here...but at or near the foul line), and no other Sun cares to take care of the weakside... That's not on Ayton. That's on Crowder, Bridges, Cam Johnson...
As far I'm concerned, Ayton is way down the list of reasons to be concerned about this series...In fact, I wouldn't put Ayton into the conversation at all.
That list of concerns is long...but Deandre ain't on it IMHO.