He also pulled JG after the INT. It's not like he hasn't been consistent.
I think the coaches are being tough on Shrout because his history with errant passes. It's tough love to try to get his INT problem under control, because they know if he can fix that, he's an NFL-caliber QB. And that was an absolutely terrible decision by Shrout; this is his biggest problem is that he tries to force plays that aren't there.
Pruitt / Chaney made the right decision. We didn't need a high-scoring gunslinger to win this game; not with the way the defense was playing. Not turning the ball over was priority #1.
As much as people want to complain about JG struggling with the mental side of the game, Shrout has struggled with that even more. Yes, he's been able to deliver beautiful deep passes when he's had no pressure on him and had open guys. It's when he's had pressure or no open receivers that he's made more questionable decisions, but I'm hoping the tough love by the coaches pays off.