so some historical perspective from an old guy that has played these types of games for over 20 years.
FOF and OOTP are the two most mature and relevant.
OOTP handles by essentially letting you change as much or as little as you want. Of the many things that make OOTP king is you can easily customize almost everything extremely easily. this should be the target.
FOF is way harder to customize but does have the starting option of basically "how much variance do you want" me personally I want NONE. I want the players to reflect the real world as much as possible, after I have adjusted them to represent the truth in my opinion. I am a real world football coach and have been for over 30 years, so I do have an idea. but that isnt even the point - games at their best allow the player to play their way.