That works fine if you keep Madden's old number system the way it is now. I was proposing a combo of 2k8's ability system and Madden's numerical system. There would still be a number system, but certian players would have attributes that other players wouldn't. The ratings would be more specific to the position. For example, WRs would have ratings for every route.
In my opinion, there are already too many ratings. I'm no programmer, but the myriad of ratings may be what is causing the ratings to be irrelevant. If there were ratings for every route, there wouldn't be any need in giving a olineman or Dlineman ratings for every route.