If your job is on the line, who is your starter?
My opinion is that I want to see Horn get meaningful reps. Let him start. I would love to see what he can do. If he doesn't give you what you want, then you have Cook waiting in the wings. I'm not a QB coach and I don't see practice every day, but from the limited view of Horn, it's hard to not see his raw talent. Horn is your ceiling, and possibly your floor. Cook is safe but limited.
My opinion is that I want to see Horn get meaningful reps. Let him start. I would love to see what he can do. If he doesn't give you what you want, then you have Cook waiting in the wings. I'm not a QB coach and I don't see practice every day, but from the limited view of Horn, it's hard to not see his raw talent. Horn is your ceiling, and possibly your floor. Cook is safe but limited.