I read it as Dak being a little off in his throws, which is only mentioned because it was out of character. Whatever.
He's just not a very good route runner right now. Maybe in swing passes or if you can get him lined up against a slower LB. Fuzzy mentioned the break coming out of his routes, basically you need to be sharp in that aspect for timing and to get your body between the ball and the defender. Sloppy breaks can lead to batted down passes, or picked balls, or just incompletions because you were a step behind. I agree with him there. Not many backs come into the league with that skill though.
He could definitely be a Faulk/Tomlinson threat, if he puts in the work. He's a special talent and his ability to change direction while not downshifting is awesome. I wouldn't be surprised if, over the course of the season, we start using him more as an outlet in space. We haven't used it that much because i'm sure they have a schedule of breaking him in, but I think they'll probably add some wrinkles in there as he progresses. He's too good not to do it, a legitimate 3 down back.