His fastball location the first two innings was not there, and that was forcing him to make too many pitches.
It's the one pitch you can throw over the plate and you don't have to be perfect. It's a fastball, yet it moves. What can be better than that? The only concern is to get the ball down.
He's making a couple of mechanical adjustments to make sure he can maintain a good delivery, which will give him a good chance to make better pitches more often. But he's getting movement on the ball and tremendous explosion on the fastball.