Unless he can articulate how each of his formulas are calculated it's another list of college QB's.
Scouts are paid to watch these guys drive the ball downfield, with accuracy & timing & success while avoiding the rush.
Also looking at footwork, standing tall in the pocket under pressure, escapability, extending plays, throwing on the run accurately, holding the ball properly, dropbacks in 3, 5 and 7 steps and other stuff.
Like intelligence, do his teammates generally find him a likable leader or is he a bit of an asshole? Does he quit?
Does he take coaching & criticism well?
Just a mountain of information.