There is a reason Dzeko seems to have the most impactl coming on as a sub in a situation where a goal is desperately needed... That reason is that the entire team plays with more urgency and quickly pass the ball forward where Dzeko can run onto the ball. If he doesn't seem to be as effective when he starts, it's because the team plays the slow passing build up that really doesn't get us anywhere anyway. Let's face it, we're not Barca! Why not adjust the tactics to suit Dzeko as a starter? Clearly he has shown he can score 20+ goals a season regularly. IMO, we should play Aguero-Dzeko regularly when fit, and Tevez can play an advanced midfield role. Wishful thinking, i know.