Need to credit the Dallas defense for opening in a 3-2 heavy dime with McClain being more of a hybrid safety than a LB (hence the "heavy" dime), which, as far as I know, wasn't something they'd done in a long time, and when you factor in lack of recent tape on Hardy and McClain, I don't think it was too surprising that we had a bit of difficulty at first. But what separates us from the rest of the league is our ability to continually adjust until we hit on something they couldn't defend.
We really need to put away that "halftime adjustment" myth; we always start adjusting right away- never at halftime. Going off memory here and no DVR so maybe someone can correct me if I'm wrong, but I think on our first three drive, we went with three different personnel and alignments. Balanced, then heavy with Blount, then stacking and shifting our smaller WR's inside and started running crossers with them, heavy on the picks and I think that's what broke the game open- alternating smashmouth football with pick plays which is why you saw OPI on Edelman, Martin, etc. My favorite part of the Edelman TD was that it was off a pick play (Amendola) right after Edelman was caught "running into" a DB. Who else but the Patriots would do something so ballsy as calling another pick play right after being busted? That just made me laugh. I think that had to be intentional, sticking it to Jerry Jones in his own house.
Now the definition of insanity is doing the same thing over and over again, and expecting a different result, and that's pretty much how you could describe the Dallas offense with Weeden in there. For me there was never any doubt of the outcome.
