I don't know, a 34-year old DL who's already missed most of a season due to a blown achilles (granted, he came back from it in pretty fine form) who's already showing some signs of decline, doesn't exactly scream "pay that man $9 million"! Now, let the guy test free agency and re-sign him in a month to something more team friendly, sure!
As to the relative values of Revis and McCourty, I can't argue with you - I kind of agree there. McCourty has made some great plays, and he allows other DB's to play just a little bit differently too. But the both of them together really seem to make that secondary hum. I do think I disagree on just what Revis wants at this point in his career, especially after the season he just had with the squad he just played with, and a lot of what he has been saying over the past season, but the only one who really knows what's in the guy's head is him.