Both can be true, I think. There seemed to be a greater variety of pre-snap looks, things like receiver stacks, and we didn't appear to shy away from throwing at any specific area of the field. Schematically, it was quite the departure from what they've been doing, which was to attack where physical match-ups were won and not much else. Yesterday was different.
Dak was not facing much pressure nor was the coverage very good, but he did precisely what a really good NFL QB does against bad defensive units: He was almost unmerciful in exploiting it. That's really all anyone can ask.
There will be days this offense stalls and we again go through this exercise of assigning blame to Dak, Kellen, and so on up the ladder. That being the case, we just might be tougher to run tape on (scout) and prepare for, but sustainability will ultimately be borne out of execution. So if this offensive line performs to its paper and continues provide the passer time to read and execute throws, Dallas is going to be a really hard out.
The notion that each pass should be this picturesque threading of the needle or drop into a bucket from 40 yards is fantasy. Tom Brady gets help from his receivers, too. Drew Brees has been known to miss open targets or occasionally under throw a tight end. Not putting #4 there just yet, but if yesterday is any indication that his maturation is real, then it's definitely a problem for the rest of the NFC.