I know I am in the vast minority for this suggestion; but, I figure it would be an idea for some. I'd like to suggest a GM/owner based league option. Basically, everything a custom league offers minus the coaching aspects (gameplanning, scouting, etc). You essentially give the keys to the head coach to coach, scout and play call.
Yes you can currently do this by letting the AI do all the scouting, but you are at a serious disadvantage competing. Plus, if you start the season and let the AI handle everything, you may lose that team due to inactivity.
I think you'll find some players on here are newer to the sport of American football and I think this would help start them off learning.
As I said before, I know I am in the minority on this.