Pertaining to Luck for OROY or how it impacts his stats, having a decent red zone defense (15th) makes no difference. The only thing that impacts is W/L. He is not on the field as often as he should be, our defense struggles to get him the ball.
This is the most important thing about what you pointed out. Lesser teams can walk all over our defense, but we still hold them enough times to FG trys to pull out wins. Better teams break through our defense pretty awful and destroy it putting up big numbers and force Luck and co. to try and throw us out of a deficit.