The zone coverage allowed Beck to calmly go through his progressions all night. The Miami WR's aren't very good and ND should have been in man all night and brought more pressure on Beck. The ND line had no chance against Miami hat on hat.
Poor tackling on the second level was evident all game, I stopped trying to count the missed tackles.
In the end, Miami was able to run at will and that's why ND lost. The substitution pattern wasn't ideal either, it seemed over the top to me and diluted the talent ND needed on the field.