I know it's only spring training, but he looked real good. What I like about him is that he always repeats his delivery and he hides the ball so well.
If he stays healthy, he's going to have a good career in the majors.
His control doesn't need to be perfect. He's a power pitcher. It's very rare to see a power pitcher have great control.
I agree that he should go to the minors, but he should be the first option to bring up if someone is injured or doing bad.