If Nadal didn't start every return of serve 12ft behind the baseline he would have been dictating the points rather than always playing catch up.
nadal's ROS doesn't have an offensive element. he never developed it. he doesnt have the short back swings that djokovic and murray have.
his defensive ROS, combined with weak 2nd serve, make him just a tad less than djokovic at this stage. fitness wise, he looks the goods, and i favour rafa in the longer rally