i kind of disagree with the sentiment that the sim having the same strategy from game to game, and different sims having different strategies is not sufficient variation. i think that would be awesome.
look at humans today. maybe not the bad teams, but when you are playing NT games. if you spend 20 minutes regularly analyzing games for about 2 months, and then do so in the NT, you will find that significantly more than 90% of the time, the other coach does exactly what you expect. you can almost always get the tempo and if you don't get the +/- setting, its usually off by 1. the amount of 3s, who will take shots, the depth chart, its all very predictable. and when the opponent isn't predictable that late in the season, they are usually trying something crazy as a last hope and are shooting themselves in the foot. not to say there aren't sometimes great surprising game plans that win games, but it is by far the exception, not the rule.