It may be a small sample size, but I lower User Qb Acc from 38 to 7 in the CFM menu. I go to play as the Chargers vs Lions and Philip Rivers was pin point accurate, I went something like 11/15 in the first half, literally every pass was on the money. So I exit out and go to the main menu, set the sliders, import them into the same CFM and there was a clear cut difference in Rivers accuracy.