Bring back different fighter ratings over different weight classes

I understand that in UFC 6 you want to keep the rating of the fighter in their prime, but those ratings must not translate over to weight classes. 

For example, Jose Aldo in his prime was definitely a 5 star fighter, but that was at featherweight. In bantamweight he should be a 4.5 star fighter because he was never in that weightless during his prime. 

Another example is Conor McGregor. I understand him being a 5 star fighter in featherweight and lightweight, but not in welterweight. 

This just goes to show you that you cannot have the same prime ratings of fighters in all the weight classes. They need to be different with respect to the weight class they are in.