see this is the gray area that the ratings struggle to get right. You have a receiver like Welker who really can't hold a candle to most of the top flight receivers but how do make him a effective playmaker on the game. You jack his rating waaay up. You can't have him do what he does in the slot with 80 speed, 5'8, 80 jump..his ratings would come out horrible.
Is Cruz better than Nicks h@ll no! Anyone who truly understands football knows that. If you had to rate all their attributes side by side Nicks would be superior in every category except speed and salsa dancing.
Now if you ask is Cruz every bit as effective or as much of a playmaker as Nicks than yes he is. That is why ratings should almost be broken down into type of player. I know it would take a lot but quick example
Technicians - Rice, R Wayne, T. Holt, H. Nicks, R. White
Athletic - C. Johnson, R. Moss, J. Jones, A Johnson
Quick - W. Welker, D Jackson, V. Cruz
Each class can have attributes from the other class but their base running, catching, and route running would be based on their class everything else would fall below it. There can be more classes like possession etc but the ratings should be based of how well you do in specific areas not just numbers.