Actually you're right. Not only will he have to share the load, but all the pass plays will limit him also. Maybe 15-20 carries? I ask that because I don't think you use his abilities correctly at 10 carries.
I don't think he can physically handle more then 10 carries a game. The whole Deuce/Bush thing is probably over. You'll probably see Thomas/Stecker (or his replacment) getting more time next year.
It only took 3 games/24 carries for him to blow his knee out this year. This is now 3 straight seasons that he has missed time, 2 season ending, with knee injuries.
I really wish he'd restructure and retire. He is gonna end up destroying his knee if he plays again. I just have a bad feeling about it.