From what I saw Dak spent 3 quarters thinking too much about the rush while staying in the pocket. His footwork wasn't good, he was throwing while backpedaling many times.
By the fourth quarter I think Romo had calmed him down and urged him to move and roll out if he had to, like he did on the game winning play when he moved up in the pocket then rolled out to the left to give himself some space and then finding Witten in the end zone.
Dak does need more pro coaching on his release and his footwork, no doubt about it. He will face more great defensive front sevens like this that will put the pressure on him and he's got to be able to get the ball out quicker with more velocity on it while setting his feet.
As has been mentioned in this thread, when the pressure mounts Dak's footwork is breaking down, leading to some awful throws, several that bounced off the field well short of the intended target. Other times it resulted in slow, fluttering passes that defenders were able to position themselves to defense. I counted 3 passes to Dez successfully defensed by Eagle players because the ball arrived too slowly.
14 targets, but about 1/2 of those targets were inaccurate passes where Dez couldn't really even attempt a play on the ball. 3 were defensed due to being slow in the release, and 4 were on target and resulted 113 yards and 1 TD.
As he grows in this pro style offense and learns to play the NFL game, Dak will get better at throwing the mid to deep stuff to the WR's. We have a good coaching staff and he has an awesome mentor in Tony Romo, one of the best. I'm not worried about this kid at all.
As far as Dez goes, even with Dak's problems with inaccuracy last night, Dez still turned 4 catches into 113 yards. Once he and Dak are on the same page and in sync together and Dak gets coached up, they will be a formidable duo for defenses to stop.