Email from potential coach quoted...
Full rotation is where they finish the pitch with their hips square to home plate. In my opinion it gets them ready to field a ball instead of leaving them open and falling towards 3rd base. Being able to field and protect themselves to me is number one.
I've never lost a pitching coach, but I did lose a kitty once. We put his pitcture on some fliers and asked people to give us a call if they saw him. You could try this.