Whoa - Moorehead was here for a cup of coffee and thrust upon HCRE, so let's not annoint him a builder of the program. And he did not leave because a freshman was not appointed the starting QB. He's a great coach, but let's not rewrite history to make a point.
Completely agree with everything else, including that picking Johnny Mac (because he and Moe P were best buds and would hang out in SW with P's kids) was his 2d worst decision - after his OC hire. However, your premise remains flawed, he could identify qb talent. This is not a defense of P, but we simply can't just make sh1+ up and hope no one notices, ok Donald?