See, I absolutely disagree with this. Midway happened historically. Should that result be the "midpoint?"
IF a game begins at the moment that McClusky is in position, enemy CAP is out of position and out of ammunition, enemy AAA is depressed and out of ready shells, and the Japanese strike group is rearming on deck -
absolutely the result better be the midpoint. You might get 2 or 4 carriers in that attack - but the norm better be 3 - or your model is not simulating well.
On the other hand, players are not required to break every one of the rules of war when they plan ops - that is what Morison says - they broke em all at Midway. So if they don't do that - and your sim is accurate - they should NEVER do that badly.
I was talking about a game that begins magically on Dec 8 (Japan date) -
everyone in position for the Japanese plan to execute. In THAT situation I EXPECT AI to do as well on the average as they did historically - of the system is not properly "calibrated" - and were it mine - I would adjust it until it WAS the normal result.