I would bring him back. I'd declare offensive indifference, sign him for his glove, and HOPE that has a stronger season with his bat.
He should be a great mentor for whoever is going to fill his shoes.
I saw nothing in Larnach's defense that was good. He looks slow. Nothing great throwing the ball. Didn't hit much. Sloppy defense. Some of those can be coached. Some can't.
He Is a downgrade from Cave, IMO. We will miss Kepler if Larnach is our new rf.