Oddly, I understand the response there by Pittsburgh fans has been rather chilling. For instance, Baltimore interviewed 20 people to replace Harbaugh; Steelers interviewed three, the minimum needed to meet the Rooney Rule. And McCarthy had no other offers, so the Steelers weren't even in a hurry. Apparently they picked McCarthy because he is a hometown boy from there and small cities love home town boys. Now McCarthy has hired some coach he knows from the Raiders.
Curiously true, but all of McCarthy's successes came with just two QB's, Rodgers, who I've heard cried when Tomlin left, and Dak Prescott I believe. Every other QB he has played with they bombed. Now Rodgers is 43 and the Steelers are crazy if they bring him back again and right now, their other choice is a rookie who has never even played yet in the NFL, so, we will see.
McCarthy has been a good coach, but the guy is into his 60s, and he is facing a team now with no QB and many other players on the team are getting old.
McCarthy seems yet another decision by Rooney to keep buying time with over the hill people, first Russel Wilson, then Aaron Rodgers, and now Mike McCarthy.