McClellan will do well in Detroit.
He's a great coach honestly. He's proven consistently he can take struggling barely bubble teams and make them into locks for the playoffs that based on their regular season record, you kind of expect to do damage.
He does a great job developing players, he sets a string plan for how the team needs to play to win and to a man gets the entire team buy in, and just generally standard that's necessary for success in this league. And he's done it for decades.
The bad obviously is that he's fairly tactically stale, and isn't amazing at firing up the boys - as such I don't really see him as a cup winning coach. But again - he's brought multiple teams from the brink of mediocrity and despair into the light of the leagues top 10.
He's exactly what Detroit needs right now.