You're spot on, Dzeko played a huge part in our success and people should be in no doubt how much he contributed. When we won the Premier League the second time his goals in the run in were crucial for us. Unfortunately he went to the World Cup and came back a shadow of the player he had been the previous season. Even from the stands his attitude in games looked poor, like he didn't have the appetite for it any more.
Dzeko was a fantastic player for us, one that should be remembered fondly, but we let him go at the right time, having got the best out of him.