I think Schwartz is better head coaching material than Ryan.
First and foremost, Schwartz is intelligent and a good football mind. When he was hired by the Bills I posted a thread about the parallels between Schwartz and Belichick (here).
Last summer I started a post about the hype of Ryan's D vs the results Schwartz got (here). It appears Ryan's D will not eclipse Schwartz on the most important stat, ppg.
My point: Pegulas, admit Ryan was mistake. Get Schwartz back here before someone else picks him up. Ryan may be a good D coordinator, but as a head coach, he just doesn't have IT, and I believe the Schwartz does.