Castonzo coming back is crucial. It strengthens three spots. LT, obviously. RT, because Haeg is better than anyone else that's on the roster and available. And RG, because it's less for Slauson to worry about. Hopefully having better talent next to him will improve his play in week 2.

Yes definitely true.

RB group can be OK without Mack, though would be nice to have his experience.

The OL is not going to be good without Castonzo.