I agree it's the current "recipe" that's working. Control the ball; minimize risk (turnovers/penalties); make the most of opportunities to score; trust your superior defense as a known quantity.
Only question in Dallas is whether the soufflé presently on the Autumn menu can be made to rise with a different sous chef in the kitchen. Perhaps someone here can articulate a logical reason - barring injury, or utter performance-related collapse - to insert Dak into a scheme that's clearly working (against quality opponents)? A few years ago, one could have said with conviction that Dak offers the option of beating teams with his legs. Yet, that's not really true since the leg injury, is it? And the proof is in that Rush is the more accurate passer, able to lead his receivers, and "throw them open", even (always the knock on Dak). And gets the ball out quicker which, no doubt, has contributed to the marked decline in holding penalties historically incurred while Dak is checking-down, clutching the ball and otherwise being indecisive behind the line of scrimmage.
I believe in "dancing with the one who brung ya." And this dance with Rush isn't over yet.