ND would be fine with 1 of these guys out, but losing all 3 really hurts b/c it limits ND's ability to use different packages to compensate for their changing personnel. The loss of Kmet makes it harder to go 2 TE and the loss of Armstrong makes it harder to go 2 RB...both those packages were supposed to help cover for the loss of Young (and Austin) and the reduced WR depth.