I pity Wade Phillips. I cannot see why he would allegedly limit the Dallas Cowboys full potential. He may not know hes doing it, but he is.
In practice, Phillips forces his players to " wrap around " their fellow teammates. When I saw how they played in a game after a bad practice like it is now, they played like they never tackled a guy in their life.
When you do stuff like this, its basically the same as not fully stretching before a game or a Marion Barber pigging out at McDonald's. You end up cutting out the players full potential. If Phillips wants to win the Super Bowl with a 18-1 record, he is going to have to simulate how the Cowboys play in a real life game.