OP, prior to the Detroit game, I was thinking the same thing: close losses to good teams, good wins over bad teams. We competed in every game we played, even against good teams, and it gave me a reason to be upbeat at 4-3.
After Detroit, my opinion of this team really soured. Why? Because I've seen this story play out before. Same old stupid penalties, same old poor coaching, same old inability to close out big games. Detroit is the type of game this team has to win for me to feel any confidence about the Cowboys. I don't want to buy into a mirage like I have so many times before.
Now, a win over New Orleans would be the type of signature win to get me irrationally pumped up before the bye.