The offense is being geared up for now. The team already averaged 20 points a game...and is improving there. That should even improve. The point differential for Dallas should be increasing.
Washington has a top ten defense right now. But Dallas is averaging under 18 points being given up. That is also improving too.
As to a general indicator, the following is at least a generalization as relevant as no NFC Championship games:
The Cowboys are on pace to allow 281 points this season, a current average of 17.6 per game. Since the NFL moved to a 16-game schedule in 1978, they’ve been at or below that number 10 times: 2009, 2003, 1999, 1998, 1996, 1994, 1993, 1992, 1981, 1978. The club made the playoffs all 10 times, reached at least the NFC title game five times and played in three Super Bowls, winning two.
https://www.dallascowboys.com/news/3-out-breaking-down-3-levels-of-change