The following are sliders I have found to be effective in the passing game. While being able to cover WRs you should be able to cover with certain coverages. You can throw the ball where you should be able to throw it in certain coverages without CBs flying from places to make plays on the ball. Also, they rarely drop easy ints. Use the same for CPU and players. Let me know unrealistic things you see. (Going for realism not accurate stats, not fun. Want it to be played like you're an NFL coach/Quarterback on Sunday. )
Update: check run blocking to 15. Intentional grounding. 43.