Wait a minute - make your sliderset however you want, I encourage this
but I'll reiterate, "hard/challenging" sliders ≠ realistic sliders.
4.2 yards per carry, <60% completions per game, ~2 sacks per game. Those are the NFL stats - if people aren't getting these, it's not realistic.
Of course these stats might not be attainable in EA's horribly flawed product, but reports of 90% pass completions are highly suspect and 0 threshold even more suspect (again, most people have no idea how to work this slider).
And yes, there are multiple broken/reversed sliders in Madden 15 this year.