When you see him bust through a hole from a QB draw or off a busted pass play dont equate that with him lining up on a design run and having the same success.
Dexter Williams is the best pure runner followed by Armstrong. Wimbush did have track speed at one time but has been training it like a RB has no...so for this year...
let him play back up to Book and next year see what makes sense after an offseason of reshaping his body and legs.