I think the fact that the generics are such a mystery in some aspects, and the fact they create holes in your offense/defense is what makes this game great. That combined with how well the legends are distinguishable among each other. Match ups make this game so strategic and because the core game is done well your play calling can help make up for weakness in your teams build.
We are all hoping for this in Madden 2010.
Have they created a ratings system as good as Ap2k8 ?
If they have not and the teams play simular to each other as they have in the past, you are really gonna be bored facing the Pats/Steelers/Cardinals/Eagles/Cowboys/colts over and overand over again