1. Many teams DO run full court press with 9 players (and I was running it with 10 prior to an injury 2 games ago). Very, very few teams (at least at the DI level, I don't know enough about the others) give substantial playing time to 9 players, much less 10.
2. While the number of players may affect the number of players who foul out, it should not affect the number of fouls.
3. I have also found (granted in a limited sample size) that ST, IQ, ATH, and SPD (not sure about D) seem to have no impact on number of fouls.
4. If WIS is going to make a defense obsolete, it should at least provide the option for coaches to change their D without a penalty. (Or warn us a few seasons in advance that a defense will become obsolete.)