Anderson, Droughns, and Davis all had a lot of talent. Davis was a star, and probably would have been elsewhere. I don't know that you can insert Mike Bell into the 1st RB and expect him to run wild. Ron Danye could probably do it, but Mike Bell? I'm not questioning the ability for the Broncos to run the football, but I don't see two of those running backs rushing for 1,000 yards.
Rod Smith is 36 years old. Other than Jimmy Smith, who else has been an elite WR at this stage of their career? Smith has been a good player, but if he gets 1,000 yards, I'll be shocked. Training camp? Playing in practice is much different then playing in live action. s***, the Bucs said they loved this kid Paris Warren during training camp, they loved him so much that they cut him. Walker's been a good player, but he's good. Not elite. He certaintly could become elite, but I doubt that he's going to hit the ground running this upcoming year.
Larry Johnson is good enough to overcome that. Don't fool yourself, Roaf was nagged by injuries, and shouldn't be confused with the dominant player he once was. In fact, he missed 5 games last year. Didn't hurt Larry Johnson.