Wimbush is a runner with little to no threat of beating a team through the air. His running will work against a lot of inferior teams. His running, however, will not beat Alabama, Clemson, Georgia or Ohio State. Last season is the perfect example. A one dimensional team lost to the teams that mattered to stay in the playoff hunt. The offense must be balanced.
That being said, since Kelly has decided that Wimbush is "The Guy" regardless, the play calling has not been consistently in Wimbush's favor.