Lukaku has been completely anonymous, but it's not really his fault. Barkley and Eto'o occupying the same sorts of spaces, and with Mirallas cutting in like he does we have absolutely no width. We can't find a pass once we've got the ball 40 yards from goal because nobody's in a decent position.
There's no reason that a Lennon-Mason-Bentaleb-Eriksen midfield should be running this. Need McGeady or Pienaar for either Eto'o or Barkley to balance us out.