Coaching at ND isn't as easy as it is with other places that are willing to cede complete control over the football program. The Notre Dame Board of Trustees would never give any coach that kind of power, which is why someone the likes of Saban or Meyer wouldn't come here.
Given the higher hurdles he has had to face, I think Brian Kelly has finally turned into the excellent, and even great coach that we were hoping he would be, but for him to become one of the greatest will still require that championship.