Krasic is a game changer, imo. But besides DP, every once in a while, he's the only one and when he's taken out of it, it's a great struggle. Another thing is that if Aquilani isn't playing well or is missing, the team loses so much quality in midfield. We could really do with a capable backup for him. Marchisio is a boss but he doesn't control the midfield like Aqua.