Reggie has been a dissappointment obviously. I know this is going to sound like another shameless "Reggie Hater" posts but think about NO's situation:
Saints have a gazillion dollars put into their backfield and Bush hasn't done much. He can't run the football inbetween the tackles as predicted, and his receptions are hardly anything more than trying to find a way to get the ball into the hands of your #1 pick. Seriously, he's more of a sideshow than an actual producer on the team. He is definitely not a full-time, every-down starter. Looking at it, he probably shouldn't even be on the field half of the time. He's a 3rd and long player pretty much. It's like investing your 1st pick in a 3rd down back.
I think Bush still has all the talent in the world to become a Santana Moss or a Steve Smith. But you've got Colston and Horn, so where does that leave Bush? If you look at what he did at USC, almost all the things he's done has been in open space, and that's where he needs to operate. But as a RB, he's a dissappointment and has shown no improvement running the ball. Is Bush the regular punt and kick returner too? I know you don't want him getting hurt, but it's even more stupid not to put him in the best position to contribute to your team. Michael Lewis and Bush both out there for your return team? Now that is something that would scare me. Lewis and Bush makes a much better duo than Bush and Deuce.