I don't think they're paying Cobb $10 mil per year to play running back.
Sorry, I should have made my thought more clear. What I meant was how they can now use both players just as they've used Cobb in the past at RB for certain packages, plus even more. The two new TEs make the run an even more attractive option thatn it was pre-Bennet and Kendricks. Lacy could run for power but I can't recall him running anything other than screens as a receiver. He was no potential threat downfield running patterns. Ripkowski, is more similar to Lacy than Cobb or Monty. And Michael is no great receiving threat coming out of the backfield. Those guys are not as versatile as Cobb and Montgomery. The latter two being far superior as multi-dimensional threats, and they should give opposing DCs fits in preparation and during the game.
So how will the D choose to stop them, heavy with LBs or DBs? They could exploit the match-ups either way, especially if they can catch the opposition in a look they really want (and keep them in it using the no-huddle). They won't need to make Cobb a permanent RB to do that.
I can appreciate why #12 is looking forward to the two new TEs to complement Cobb and Monty. Blitz, and Rodgers can kill you. Cover, and the runners can gash you. Load the box and watch the receivers run past you. Now, if they can somehow get the defense fixed...