Nadal: 2 things are quite clear
1. People have always been wondering about Rafa's "injury" concerns. It had to be a combination of injury+confidence issues+gamesmanship. His most recent withdrawal confirms that confidence issues are definitely playing a huge role. Gamesmanship is also obvious from the ill-times MTOs, but I think confidence issues are bigger.
2. Djokovic has probably ruined his chance at GOAThood. Those 3 consecutive losses in slam finals really hurt his legacy and confidence. He will still certainly be the man to beat on clay for 2-3 more years, but I think he has lost the chance to pass Fed in slam count (and weeks at #1, etc).
BTW I think that this silent ban stuff is all nonsense. Athletes may dope or not dope, but a silent ban is impossible in this day and age.
Hard court h2h: Rafa vs Fed : 9-6; Rafa vs Davydenko : 1-6; Fed vs Davydenko: 16-2.