The observation that the short passing game basically doesn't exist is my impression as well. The fact that the run game has also been pretty effective probably factors in - why even attempt 3-5 yard slants and such if you feel like you can get 4 yards on the regular? My anecdotal impression is that Fields is both inaccurate on these types of passes and the receivers are just complete crap. Short passing is where timing, position, accuracy are all paramount. There isn't chemistry between them, they aren't adjusting well to his ball (which is often all over the place) and they usually aren't getting up field or breaking tackles, which is necessary for that kind of offense (which is also.....just how offense is generated in the modern NFL). Basically we have a 1970s offense - no short passing game, run on 1st and 2nd down, and Fields attempts a 10+ yard pass on 3rd down. And he's shockingly good in those situations, given the circumstances!