One thing I have been thinking about concerns play calling - especially defense. If we set our defense up for 50-50 run vs pass we are really saying we think the offense may go with either play call. But the sim gives us all pass or all run as defense. Setting up for other percentages (80-20, 20-80) whatever gives us better odds to call our hunch on the offense play call, but still will produce an all rush or all pass defense.
What I would like to propose for line play - is that the defensive play call would be a level of confidence in the possibility of a call for the offense. If we give a 80 (rush) - 20 (pass) DEF play call we are attempting to bolster our DL player ratings or formation IQ advantage to stop the offensive rush play and will be willing to accept some ratings or IQ dis-advantage for a passing play. Various team and player behaviours could be instigated using these confidence levels (CL). Since the offense knows what play it is running it should have a default (CL) of about 70 (since no matter what play the OFF is running, it doesn't know what the DEF is doing). If the defense guess is correct at 70, the play runs straight values + bonus for blitz.. If the DEF guesses correct and is above 70, the defense has an advantage and the chances of bad things happening for the OFF (fumbles, INT, sacks, stuffs etc) increase. If it guesses conservative or totally wrong, the offense takes the advantage by whatever the margin of difference the (CL) was for that play. This would work well for the first 2 or 3 steps currently in the game.
Effects for pass coverage - short - medium - long - provide opportunities for defensive positioning on pass plays as they do now. (OFF short pass vs DEF long coverage would benefit the OFF, matches benefit the DEF)