I can't wait til you move the goalposts onto another field to prop up your ego's need to be right when this season comes around.
Fields acknowledged his need to get better at taking what the defense gives him. He's used to extending plays and going deep cause his and his team's talent level was always that much better than his opponents in college (and before) so he could get away with hitting guys deep who had 5 steps on their man. He gets to the NFL and his talent level around him is worse than maybe even his college teams were and definitely worse than most of his opponents. What you need in order to excel in the short to intermediate passing game more than anything is good route runners who can get open consistently. Fields hasn't had that beyond Mooney, but still, he definitely needs to get better there, no doubt. Learning what "NFL open" means and throwing to a spot. Recognizing when the blitz is coming and hitting the hot read, etc etc. Again, Fields himself has acknowledged his need to get better there.
I think he will, without a doubt. I'm not expecting Tom Brady here but good enough. His game will never be to pick you apart with timing passes all over the field, he just needs to be good enough there. Where he'll kill teams is in the run game where his threat to run will make things easier for his running backs, using his own feet to keep defenses off balance and his ability to extend plays and hit the deep passes. Poles has given him everything he needs to do just that, so at least for me, there's no excuses this year for Justin. We'll see what happens.