My problem with Yaya is that the entire team has to be built around him, so if he decides to have one of his strolling days then we are completely screwed. A central midfielder who doesn't defend as part of the team is a real burden on the rest of the team, but he more than makes up for it when he's on a good day, but completely destructive on a bad day. A lot of the time I'd be far happier with a consistent 7/ 8 out of 10 player who we could rely on as part of the team, rather than Yaya's brilliant or awful individual efforts