I am more concerned with a back that can block, honestly. We know that is not something TP is good at. Dowdle/Davis haven't had the chance to show it yet and I don't know enough about Jones to say one way or the other. Duece, not a chance.
If Davis or Dowdle doesn't prove they can pick up the blitz consistently, I would not be surprised if Zeke is back. Say what you want about him, but he is the best in the NFL at picking up the blitz and we have a 40 mil QB and nothing much behind him, we have to protect him.
It could very well be TP, Zeke and Duece come game day.