That sounds fine in theory.
But it ultimately happens out there - on the pitch.
MON can cram his head full of instructions pre kick-off. But once the whistle goes he's pretty much powerless.
A forward up top and alongside Gabby, a bit of a gobby prick like Keane will do the managers job for him. It also helps that Keane is still a decent player in his own right and has enough intelligence (of the football variety) to pick Gabby out with a pass or slide him through in a tight situation.
