I think its more Aguero hasn't quite got to grips with whats required yet. I think he's expected to close down in the top third of the pitch if it drops deeper it should be the other players. He isn't expected to chase back. Read somewhere about Pep at Bayern he didnt want his attackers chasing back because it left them too deep and out of position. Because we aren't pressing as much high up he is chasing back and is too deep
Maybe they chatted about that , truth is we have no idea what they talked about, yet posters love to put the worst spin on it.