apparently Bournemouth steward reported to police that Aguero had hit him. watch the 5 games ban now.
Anyway, about his game, his decline was visible last season too and the very beginnings of it even the season before. His goals had hidden it a bit as you don't have to be at top of your form to score goals as a striker in this city team, but he stopped being able to dribble through players with his pace and explosivity long time ago and that was his main selling point - pace and explosivity. And it's not because Pep's tactics, it's not Pep who manages Argentina and he lost his place there some time ago.