When a complete insider says this " the offensive settings can manipulate the defense into being out of "position". The method is not in line with what one would expect to see in an actual football game, hence it goes contrary to what a coach would be able to do in the real world. It's essentially mastering the ones and zeros of this digital game beyond what is logical for a football game. The result is consistent big chunk plays, regardless of quality of the offensive player with the ball. I don't know the specific details but again, I've seen the results.
You would think this would get people's attention. More and more people are learning how to do this. Some are subtle about it, some not so much.
In Div1A, when I see a QB, ranked 31, from a small market school throw for 1830 yards in three playoff game at a 70% clip it's quite an eye opener. The players being thrown to are ranked 63-120. So typical small conference talent. Players who wouldn't even start on the teams they are putting up those ridiculous numbers against.
This exploit is out there and it's real. Likely nothing can be done about it since it's old code. It sure ruins the game for those playing legit and not using it. Common problem in all online games, but at least in other games they at least talk about it and try to fix it.