First and foremost, great work, and great data.
In my real job, I am a statistician, and do advanced analytical work. One key part to my profession is to ensure we are comparing the right things. Often exactly even samples are not available, and there are things that need to be taken into consideration to understand if there are valid comparisons. So what does this mean?
Well, first question is if there are equal opponents in the rushing yards thing. And I believe the answer is no. Sims are more likely to play sims, especially out of conference (when you are making your own schedule). I'm not a great programmer, but what would be good to see is avg rushing yards for human and sim vs each. If humans run for more yards against sims then the do vs humans, and humans run for more vs sims than sims do vs sims, then the averages shown may not be indicative of a problem. I'm hoping that is the answer...