From an entertainment standpoint it would get real old. As stressful as the Big 12 games have been the last few years I wouldn't trade it for the world. Pretty much every game in the entire conference was a contested affair.
For those doubting this, look at our own noncon schedule and actual attendance. Lots of people skip those blowouts because they can get pretty boring too after the first couple. Now imagine having 20 of those games every year.