D-lineman should be coached that if nobody is blocking you, it usually is for a reason. Traps and pulling blockers happen all the time.
Flying up the field got Clowney in trouble in his 2nd year when he got to play more. TE's would come from the other side of the formation and he wouldn't see the hit coming.
Oliver has a natural aggressive nature that has caused many TFL's. But it can also be used against him.