It is simple and obvious. The Dallas Cowboys are absolutely terrible in the red zone this season. They are 31st in the league in scoring touchdowns once they get the ball inside the 20, with only the 4-10 San Francisco 49ers doing worse. If there is one flaw above all else that needs to be corrected as they close in on a likely playoff appearance, that is it.
What makes matters worse is that there are several things that should make them much better, like the top three offensive weapons. Ezekiel Elliott leads the league in rushing and is also a dangerous pass target.