Lendl deserves credit. Not sure about Ferrer, waht did he improve so much? It's not fair to judge cause I don't see him play a lot, but I thought he mostly just outconsistented his own consistency?
Toni Nadal and Paul Annacone did a good job as well imo. Toni and Rafa figured Djokovic out more or less. At least enough to beat him on clay and Rafa was mighty close at the AO. Looked like it could be his season until grass.
Fed's wimbledon title and incredible run to number 1 again were certainly to a high degree the fruits of Paul Annacone's all out attack strategy with the main focus on Federer's own service game. Roger's amazing stats on net points won (esp against Murray) and second serve points won (esp against Djokovic) were largely due to these aggressive tactics and the significant improvement in the serve and the volley.