Quest for a new head coach, considering we are # 28 on total offense, # 7 on total defense

Your Head Coach has retired, its not change for the sake of change, its OVER. Your post (the way it reads) sounds like your trying to hold onto the past because of some sentimental reason, new coach new coaches new players new outlook.
I look at it like a new manager for a company is hired. Often times when that happens, they are walking into a total mess, with underperforming employees. In our case, we have one of the best staffs that I can remember. It would seem counterproductive to me in our case to replace all these guys who have been excelling at their job. That's not to say some replacements can't be made if the vision calls for it, but to me it just makes little sense to tear it all down right off the bat when there's really no need to.