I think that this is a great analysis, even if I still agree with the general notion that Nadal is "mentally stronger" than Federer, at least when they play each other. But your post is important because:
a) It puts "mental strength" into context (confort zones, strategical aspects, etc), and;
b) Analyzes different aspects of "mental strenght"
I was looking at it in a more simplistic way, that is, the ability to raise your level in important moments (which, by the way, was exactly what Federer did this time), and, on the opposite side, the ability to not fold at critical times, something which I believe Nadal is in a league of his own. People keep saying that he lost his self-confidence and etc, and, yes, maybe lately he could not raise his level at times, but I simply never saw a match were he self-destructed and gave it away. Of course he made important errors here and there, but when players self-destruct, and we see this a lot, they hand full games and sets on a plate (and generally the match). He will never give you anything for free. I guess that is the main reason why people regard Nadal as the "strongest mind" out there. As @attomole pointed, there is also the tactical side: Nadal always find the exact moment to raise his intensity. It surely "looks" like mental strength.
That´s why this final was completely insane, and if you will, an evidence against everything I said above: In the business end of the most important final in tennis history, Federer raised his level of play to an immense hight. Honestly, I have a theory of why this happened, but if you want to use this as evidence for this mental fortitude, there is not much one can argue about it.