I think a major part of Dak's difficulties is that he's lost whatever abilities he formerly had to scramble. Even "way back when," they were limited. Now, if he manages to succeed in a scramble or an rpo-type play, it's mainly successful if it's to the right side of the offensive lineup. Doing so to the left is far less likely to succeed, due to his discomfort passing while running left. Few right-handed QBs are capable of doing that with much success, anyway. It was a rare skill that Tony Romo often used quite effectively, though. I think Dak is too stiff in trying to do that.