I think it will come down to GB's offense, and to a lesser extent schedule next year.
Basically if the offense is nearly as good as this year, the schedule matters less. But if there is the inevitable drop off, which in all likelihood there will be, then the schedule matters much more.
Meh. You can look at schedule all you want but you still can't tell who the top run D's are going to be until the 3-4th week of the season. For the original question, keep Grant or LJ, from your schedule theory, you'd have to go LJ because of GB winning the division, right now with 2 losses. Also, no matter who their in-conference scheduled opponents are, GB will have 2 against the Bears and 2 against the Vikings where LJ will get 2 against Denver and 2 against Oakland.