IMO, the Cowboys have gotten less aggressive with the pass rush to play the run better. Micah was off ball more last week than he was earlier in the season. But it is also true that the rest of the DL has not picked it up at all.
The other thing is the games have been closer or Dallas has been behind which allows the other teams to mix up the play calling. The sacks and turnovers will come if Dallas can make the other team one dimensional throwing the football.
TBH, if I was a HC facing the Cowboys I would run the ball 67% of the time. I would throw on 1st down and run any other down even on 2nd and 10. The Cowboys have not shown they can shut it down consistently.