The thing is, none of knows all the facts of each situation. Skelton, for example, might have benefited a lot by moving away from his usual environment. It might be that Saffersens have a bigger budget for the fitness side of things, too.
Perese was still a kid, in relative terms, when he went to the Broncos, had he stayed with the Reds who is to say that his development might not have been similar? Who would know how to bring the best out of young players better than Brad Thorn? Does he need more accountability?
I'll leave it to you to break the news to him.