You quoted me, so I'll respond. :)
I am also a big fan of YPA if you are going to use a single stat. The problem is that the Author's analysis didn't use a single stat, he used a half dozen stats but crafted a very narrow swath of information, then tried to extrapolate from there. We see the failing. Of course, I would never spend time watching a 25 minute video on a player's YPA, when I could just look it up. When he professes a full analytics, and only brings this to the table ... it is extremely disappointing.
And as you mentioned Wildbill, when you look at YPA, Tannehill looked stellar. When you look at the stable data, after the initial 5 game learning curve, it looks extremely good. But the Author didn't even bother noting the new offense, learning curve, or adjustment period.