Dak never had elite natural arm talent and was never a natural thrower of the ball, his release and mechanics just aren't smooth and crisp like the top QB's, but I think he could've been effective in a Newton-type offense. A better offensive staff could get way more out of him but I think he's past the point of no return now, due to a combination of his own faults and because ultimately I don't think much has been done to help or develop him, relatively speaking.
Kellen Moore is his QB coach for Christ's sake and the offensive design/play-calling refuses to adapt to the point that Booger fucking McFarland is calling you out for 3 quarters for how predictable you are, and all his criticisms actually continued to play out in real time.
All of it is just pathetic.