I wouldn't throw in the towel for the season yet. Lets see what this picture looks like after week 10 is in the books. The NFL is very fluid in this current era, injuries arrests you name it.
I want to see the Cowboys in the playoffs at the end of this season. Some of the players on the Cowboys need more playoff experience.
Eagles look like their going to run away with it in the NFCE, but that doesn't mean you give it to them for free, you go out there you play the games and you try to make the opponent pay the toll even if they are going to beat you by 21 points or so.
In a scenario where a team is 1-7 and that team doesn't have a QB and the QB coming out of college is the clear cut #1 pick, a once in a decade type player, then i might be on board for a tanking.
Tanking would send such a bad message to the Cowboys & NFL players. To give up with a 2-3 record would be a curse on this teams future. Cowboy's org would be the laughing stock of sports, it would be worse then the Browns etc.