alright, i did some tests and i found similar results to ben's in terms of ypa (6.5ish), comp pct (61% ish) and qb ratings (82% ish). so for most people this version will be throwback football. you will have to go back to the early 2000s to find those numbers.
NFL Season By Season Passing | Pro-Football-Reference.com
i like the new challenge and now the question is, would a team be successful in those days if they passed the ball most of the time? i guess we will have an answer soon.