Stevenson isn't proven yet. Unless we want him to spend 3 years figuring it out like Taylor, he needs to go back down and come up only under emergency or when ready.
He'll just be back in Sept. anyway; they're grooming him. But it's true, he's proven in the minors but not even close in MLB. I'd keep him up unless they need room on the bench. I hope Taylor starts raking immediately and bumps Goodwin to left field. All's good if everyone performs.