Short version: Previous versions of Football Mogul would cause top players (and top draft picks) to tank in the off-season at an alarming rate. This effect has been reduced by about 85% in Football Mogul 19, making the game both more realistic and less frustrating.
Long version: Both Baseball Mogul and Football Mogul include code that models the real-world phenomenon generally refered to as regression to the mean: if a player puts up incredible numbers in one season, he is extremely likely to post a performance in the following season that is closer to the league average (aka "the mean"). One example: the #1 wide receiver (in terms of fantasy points) will lose, on average, more than 30% of their value in the following season.
Some of this comes down to luck: bad weather, lucky bounces, missed tackles. But regression to the mean also occurs at the underlying level of raw ability. The league MVP is more likely to get worse than to get better, and this applies to a lesser extent to all superstar players.
However ... I'm writing this post to admit that I made a mistake when implementing this phenomenon in previous versions of Football Mogul, and that I was finally able to fix it for Football Mogul 19. (FYI: it was a simple math error/typo that I didn't notice until I stepped through the code and realized that it wasn't performing the calculation I'd described in the comments).
You don't have to take my word for it. This year's demo version lets you access "Commissioner Mode" so you can see how player ratings progress in the off-season. And if you see results that you still find unrealistic, please let me know. I appreciate constructive feedback and take seriously any suggestions or criticism backed up by data and a logical argument.
Thanks for reading!