Dak's issues are mental, not physical. He's proven he can make the throws, but freaks out when the competition ramps up. Did you see his face today? He looked terrified out there. Probably from watching Stephen A., Skip & Shannon, etc., over morning coffee. ;-) Perhaps he could benefit from the services of a good sports psychologist. He's like a pro golfer who inexplicably starts yipping on short putts or shanking iron shots. And like that guy, he could be cured with proper assistance.
On that level, even the distraction of wearing an unfamiliar, gimmicky, "Color Rush" uniform could be a distraction. And no team in the NFL even comes close to manufacturing more senseless distractions than the Dallas Cowboys.