I totally get the reasoning, we need an experienced HC, no more first timers. We've failed nearly every time with first time HC's for whatever reason.
As a Dolphins fan there's just no way you would want Bellicheck here, especially with the all-time wins record at stake, to surpass our 1 legendary coach. It was hard enough to root for a Thurman Thomas at RB or the countless others, it would be awful for the Fins to stomach BB on our sidelines, even if he turned us around. Someone else can do it...
I know of 2 guys who fit the criteria and both want to coach, have had success, and had great defenses.
Pete Carroll and Mike Vrabel would bring credibility and both would have the ability to build a competent staff across the entire team.
I really like Carroll and believe he'd be a better personality fit after McD. Many people don't like Vrabel because he had King Henry and ran him like Wanny ran Ricky...however he was tough and aggressive, built a strong OL and had a very good, tough and physical defense.
Both coaches would instantly improve this team, we would shed the soft label and play tough and smart football.