Superstar mode offers a new player progression system, but that's about all there is to it -- earning skill points to raise your attributes. Unlike RPG-esque modes in other sports games, there's no sense of working your way up: you become Madden NFL Overdrive Coins the starter immediately, regardless of the other players on the team at your position. You could create a 69-rated QB and join the Green Bay Packers, and you'd start ahead of the 98-rated Super Bowl MVP Aaron Rodgers, whereas Rodgers himself had to watch and learn from Brett Favre for years before he was given the starting job.
And while you earn skill points for performing well, the actual breakdown of those points is a mystery -- as a running back, I've earned points for Buy Madden NFL Overdrive Coins touchdowns in games where I didn't score any, and I've been docked points for being sacked. In addition, you don't seem to get points for doing the little things, like picking up a blitz. But perhaps my principal annoyance with Superstar is the fact that you can't turn off the coordinator audio; I stopped playing the mode because I just couldn't listen to him explain a draw play one more goddamn time.