I didn't vote because this multiple choice question did not have "All of the Above" option
Truely, everything except the Davids part contributed.
Both Lippi and Moggi are professionals. It simply didn't work out as we all wanted.
For three years Real Madrid has been winning with the poorest defense among top clubs. But look at MU- injuries and suspensions knocked them out of pracitally everything (except the FA where they'll get wooped by Arsenal)
But when we were topping Seria A and our CL group, Lippi was saying something like "we lose goals, but we also score more goals, and if that's what it takes to win- let it be". He thought that midfield and attack will keep playing well. He was wrong, but everyone makes mistakes!
Good question, by the way...