To be fair, everyone saw how much we missed Ryan Grant before James Starks took the field. Come the playoffs, one can still consider James Starks to be "fresh" compared to all the worn down players from playing so much football already. I do not want to take away from what Starks did for the Pack in the final weeks of the season and the playoffs, but he definitely had more "gas in the tank" than most players did.
That being said, I think Grant is needed in the ZBS system and will be at the #1 spot. Maybe he will just be considered #1 but him and Starks will split time depending on the progression of Starks with all the offseason work.
I voted Grant, but this can definitely go a different way.