Agreed but I think this is as much about personnel as play calling. When we inserted a fullback/h-back into the lineup Knighton gained the yard. When we tried to run power out of a 3-4WR alignment (Mallory is more WR than TE when it comes to blocking), we lacked the numbers and were stopped.
I would keep an FB or HB on the rooster just for short yardage situations. After all, that is probably 2-5 plays per game and they are all very, very important plays. Forget trying to fool anyone in short yardage with personnel. If we want deception, use the big lineup and then sneak someone out for a pass like we did with Knighton against UVA