It did look pretty bad, but as has been said many times already in this thread, you see similar incidents go unpunished quite often, so it would be nice to have more consistency. And although it's a bastard that he'll miss the United game, the slight silver lining is that the other two games will be Swansea in the League Cup, where he would probably have been rested anyway, and Bournemouth at home, who you would hope we can beat without him. If you're a glass-half-full person, you might also wonder if it'll be harder for Mourinho to organize his defence without Aguero to focus on. Kelechi is more of an unknown quantity, or Pep might go the false 9 route which might really confuse them.