If I had to guess why all of a sudden the "light came on" for Dak, and that is that for the first time in his career he isn't playing under Garrett or Garret Jr.
I mean, have we had any "all 4 receivers run to the sticks and turn around" plays this year? I mean, that was a staple in the Cowboys offense since Romo was playing, yet I can't recall a single play like that this year. We use stop routes still, but not with everyone doing it on the same play.
So while the complaint were that Dak "wasn't a real NFL QB", maybe, just MAYBE, that because he never ran a real NFL offense.
I'm sure this is an oversimplification, and I really did not like Garrett or KM (once he showed he was VERY Garrett-like), but it's just a theory ... A football theory.