Tommy: I've found myself nodding like a bobble head doll for just about everything you've said in this post, mostly with gratitude and appreciation for the care with which you've put all of this together, and analyzed it to boot.
But I must join Newton and quibble at the same pick at which he knitted. (Does that make me a "re-quibbler"? I hope so. It sounds like something Seinfeld might say.)
First, I agree that Seth was generally irrelevant in the play. He was in proper deny defense as far as I could tell. I also agree that a huge caveat here is that the players may have simply been in the positions the coaches told them to be in, so the quibbling, re-quibbling, and over-quibbling we do from afar may be a moot point. (Or a "moo" point as they say in Chapel Hill--my understanding is that the letter "t" has been dropped from the alphabet there, as they've begun to counter our proclamations of Coach K as "the greatest of all time" by calling Roy-Will "the greatest of all." This should probably be met with rejoinders such as a recalibrated satire of "The Greatest Love of All" featuring Roy-Will and the fan from the Presbyterian game, but I digress. Again.)
So let's pull up the screenshots:
Attachment 2256Attachment 2257Attachment 2258
Looking at these, I'm compelled to disagree with you that Austin could not have had an effect on the outcome of the play had he been in better position. From where the ball was at the time the screen was about to be set, Austin presumably should have had at
least one foot in the paint. His head, to be on a swivel, would have allowed me to see the screener darting for the basket. With a single sidestep, he could have placed himself directly between the cutting player and the basket.
If the screener then dished it out to Austin's man, Austin would
not have been responsible for the three-point shooter in that instance; Seth Curry would be. And at some point after the ball had been dished out to Austin's (now Seth's) man, Mason would have needed to recover, and Austin would have needed to guard Seth's old man. Or something to that effect. I'm spitballing now. The point, though, is that the rotation would have been expected to continue.
So there's my re-quibble. Now, that isn't to say you should adjust your masterwork above. As I said before, it's superstar stuff. We're just being ungrateful readers by pushing you to make something perfect more perfect.