When you think about it, if you have a good offensive line and an exceptional running back, it does make things easier with a 2nd or 3rd string QB.
End of the day, the biggest difference between the Cowboys and Eagles (as already mentioned) is I do believe the Eagles goal is winning the super bowl and not just getting into the playoffs. If the Eagles coach can't make a at least a deep run to the Super Bowl, I do give it good odds that he is gone next year.
Meanwhile, with the Cowboys you have no clue exactly how much Jerry is out of it with his brain and have no clue what kind of bone headed decisions he could make keep things exactly the same. I'm beginning to seriously think that the less work that Jerry has to do being a hands on GM, the better he likes it, even though the position requires hard work and perhaps even some long hours.