I'll give it an A... It is great fun, but there are a few things I wish they could have improved.
1) The graphics don't see that much improved. There are a few improved textures and such, but the game's graphics are only a marginal improvement over the previous three versions.
2) EA - QUIT LEAVING NCAA IN MADDEN'S DUST! IT'S INSULTING TO COLLEGE FOOTBALL FANS! If you're going to upgrade madden, then upgrade NCAA too. I know EA put in the new look stick (or whatever it's called) for QB play in Madden 2006 to counter people playing with Vick. NCAA football has the same problem -- his name is Vince Young. He is faster and tougher than 4/5 of the running backs in the game. People are going to be doing the Vick trick with Young now. And no way to counter it. Thanks a lot.
3) I think if you're going to make Race for the Heisman in a format that's supposed to be the perspective of a single player, see it all the way through. For example, when you're playing the game, make it so you can only control your guy. It may sound weird, but it's something that would have made the experience truly different instead of just having a whole new mode that is just Dynasty without recruiting.
That's about it... Other than that, great game.