Down and distance is pretty darn logical to me. And the computer seems to adjust and sometimes even cheat when you audible to a different play. The computer also seems to change its defenses so, it's not like every first and 10 you're gonna see cover 1. You'll still get zones, combos, man, and blitzes that are geared toward the down and distance. My guess is if you run the same play over and over the defense may not recognize you're running the same play but, they aren't running the same play therefore the result will not be the same.