You're right. He'll be a good coach anywhere. The culture is the hardest part. He is a two time Super Bowl champion, Hall of Famer and top 100 NFL player. If you aren't old enough to remember his playing days, he was awesome. Because of his greatness as a player he can demand more from players and they will listen and respond. My understanding is he is an old school coach and very demanding of his players in practice and behind closed doors. That means a lot.
I know a guy who played with him in Atlanta. He told me once the doors closed and the cameras weren't on, Sanders was a different guy in a good way. He said he was one of the nicest guys on the team and treated everyone well. Sanders autographed a bunch of jerseys and posters for his son's.