1) Kelly's coaching malpractice in 2016 was so severe that I don't think he can engender the faith and respect necessary to turn the program around now in one year's time.
2) His mean at ND is really 8-5. It's more likely he'll deliver that than anything...and that should no longer be enough. (If it is, this then falls on other parties who also deserve to go.)
3) He has an unproven quarterback going in. Last year he had a pre-season top Heisman candidate.
4) Defensive line is a problem...and I also see a hangover for this defense recovering from Van Gorder.
(Off topic, and certainly not an actual reason, all of my teams are on a terrible roll and I don't think Kelly's gonna stem that tide.)