So with Cook's routes its not an apples to apples comparison.
He's a running back running deep slot routes, that's what makes him the weapon he is. How many RB's in the league can do that ? Most RB's in the league are only catching short checkdowns out of the backfield.
Cook running deep routes makes him a matchup nightmare.
Now you are correct he has to clean up the drops on the deep routes and he will. I have no doubt. He was running deep routes at Georgia and never dropped the ball.
He just needs more time and he'll be something special.