He is playing as well now as he ever has. That is not the same as me saying that his level didn't dip at any point. His level has picked up again in the past 6 months. How can you possibly look at his current form and argue that he is inferior to 2006 Fed? He is playing incredible tennis. He has barely lost a match since last summer.
Are you telling us his movement & footwork (the pillars of his greatness) are even better at 30 than say at 25/26 ? Ignoring context much ? Winning no name tournaments in the last six months does not make this Roger EQUAL or BETTER than 2006/2007 Roger. Go back and watch the old vids and see what Roger could do on court because quite clearly you have forgotten.