A lot of that was because Clemson was paying so much attention to the Heisman winner that they left guys to cover Howard that were mostly thinking run stop 1st, 2nd and 3rd. They also had a very complex scheme to get it done, but lost their best DB pretty early. After he left, Howard had a field day. Didnt do much before that.
It was not like the complaints about BV when he was at OU. Very complex can be awesome. But when you use a backup, assignments get blown. There are not too many college defenses ever that could stop that Bama offense, missing their best two defensive players. Pretty big difference before when they had both and in the 2nd half when both could not go. Howard did bot have a TD catch for 14 games. So it is not like the TE was a big part of Kiffins offense.