I think he expected Voronin, N'Gog, Babel and Lucas to step up and perform. They haven't and whilst I'm not blaming these players it meant that RB didn't strengthen in these areas.
CM is the biggest failing for me in that of our CM's we have Masch, Lucas, Spearing, Plessis and possibly Aurelio who are all defensive. Only Gerrard and Aquilani offer any creativity and attacking threat.
As for up front, I'd rather see Kuyt or Babel replace Torres when needed than Voronin. I didn't see the game last night (thankfully) but every time Voronin comes on he spends the first 5 minutes ball-chasing all over the pitch. He isn't there to pick the ball up from the right back position. Get up front or get off the pitch!