Without trying to sound like a Kopite, they were on top before the red card, then just completely capitulated.
Not saying he isn't a good manager, but he's now spent a vast amount of money at City, and if they don't win the league this season, you've got to consider his tenure a massive massive flop (Champions League pending).
He walked into the Barca team, which I believe is the greatest of at least the modern era, if not of all time, and done what was expected... Won!
Walked in the Quintuplet winning Bayern team assembled by Jupp Heynckes, and made them worse. In a league where the only competitors are Bayern, that was easy.
I think he's a good manager, I just think he's vastly overrated. Still time for him to prove me wrong.
Oh, and before anyone asks, yes. I'd have him before I had Koeman.