Because MFN is a statistics driven simulation and only passive adjustments can be made after the fact based on statistics compilations, those compilations need to be accurate. But i have noted dozens of stat errors which should be reported to some central thread for fixing.
Just now i was looking at my team's stats in MFN-2 (WAS) after one game (a really good time to check for stat errors) and i noted that many of my players are listed as having played X number of plays but the stat for games played is 0.
Stats need to be accurate because they're the basis for most decision-making.