It's when something like this happens, that the likes of Dave and others are in their element.
They use things like this to try and validate their hatred of Koeman (see
@Zatara in the have gone back to being a Moyes team thread), so they big up the player to make him sound like a world beater that the manager has not been able to hold onto.
Apparently now Barkley is potentially a Ballack, despite him being obviously indecisive, despite him being mentally weak and despite him being just a decent midfielder - but hey, lets compare him to a former world class star as hopefully nobody will really remember how decent Ballack was.