There is no way around the fact that the injuries to Overshown, Vander Esch, and especially Diggs, have weakened a defense that had the potential to be historically dominating. This has and will most certainly impact the results of this season.
I'm still waiting for some players to show some signs of that breakout season that the Cowboys now desperately need. The team would recover some of the potential before Diggs injury. As far as potential defenders in this category I see nothing from Sam Williams, Israel Mikuamu, Chauncey Golston, Neville Gallimore, or Nashton Wright. They are huge disappointments six games in.
Daron Bland and Damone Clark seem to be the only young defensive draft picks with a measurable increase in their contributions to the team's success. I had really hoped for more.