The O-line could have performed better, true.....
The bigger problem Bledsoe faced was that the Cowboys either didn't recognize or couldn't handle all the different blitz looks Jim Johnson (Eagles D-Coordinator) threw at them.
That could be a number of people's responsibility.....
QB/WR combo to use "hot routes" vs. the blitz or the RB's to "pick up" the blitzer with a block. The Eagles like to blitz 20% of the time, but it seemed to pick up as the game progressed.
Getting TO involved in the offense earlier in the game would have benefitted Dallas, as well.
It's almost always easier on Monday to coach Sunday's game!