Spread offenses taint all per game defensive stats. Those should be per snap numbers for the sake of valid comparisons.
Points per play and yards per play are at the end of the chart. Also yards per rush and yards per attempt.
I wonder if Bill wants defensive balance via pass% vs run%.
Maybe, but I don't think there is much you can do now. I think the defensive chart moreso than the offensive chart shows the shift of offenses in college football in the 00s.