Not sure if it is a Dak issue or a team issue, play calling. But they need to work on those crossing patterns that tony and Dez had going on. Seems to produce some big yardage and TD's.
his footwork, and intermediate range passing already been mentioned. As pocket awareness. It hasn't been horrible, but there is room for improvement, to cut down on those fumbles.
more deep passes, if for anything to keep defenses honest from stacking the line...but this is more of a play call, and WR's getting separation as we need a true speed deep threat to allow this. So that is not on Dak, and I am not sure how his arm strength /accuracy is for those.