Turnovers and Defense.
The Dallas D caused 8 Denver turnovers - Dallas's defensive front four was tremendous combined with Thomas Henderson's athletic play at LB.
Likewise, when Dallas won their Super Bowls in the 90's ~ defeating Buffalo twice (92 & 93) and Pittsburgh (95), it was the defense which caused noteworthy and timely turnovers which significantly improved the chances of Dallas winning those games (Jim Kelly getting sack by Haley and fumbling and throwing interceptions by being pressured by the Dallas front, Thurman Thomas fumbling, James Washington's interception and fumble recovery, and Larry Brown's well-timed interceptions against O'Donnell).
Sure Dallas had offensive stars in their Super Bowl wins, but the Defense playcalling and aggressive playmakers on Defense were, in my opinion, the unsung heroes and the keys to the victories.
Maybe Monte Kiffin and Co., can reinvigorate an assertive and turnover mentality with the D.
But with Jerry being the ultimate player-personnel decider, who knows what will happen.