I think he knows what's wrong as much as any fan does given his comments about our set-piece issues and weak mentality, he was trying to bring in that extra 2% with guys like Vermaelen and Koscielny (i.e. guys with a bit of determination) at the back and Chamakh up top (someone who's won titles, even if they're French, and has top level experience) but failed. Now he's going to try and bring it in again with changing up the squad and presumably bringing in more experience again, he needs to get it right as this'll be the 3rd straight year of failure imo and that needs to change.