It seems to me that the biggest difference between a decent RB and a great RB is their vision. A RBs ability to see a play unfold and take the correct route for the most yards is what sets the best apart from the rest.
LJ has vision and ability. Ropati has ability but seems to hit the hole the play was designed to open up regardless of if that happens in the play.
I will be interested to see if Nawahine, Hounga and Davis have more vision.
Is vision a skill that can be taught?