I agree that the Pack need a RB, but I don't think we need an "explosive" one. Just one that gives us a running game that can be a threat. Grant slightly gives that to us, while Jackson, Kuhn, Starks, and Nance just don't.
I also agree with the OL, however I think we need to completely overhaul the left side of our line. Clifton, Colledge, and Wells are just horrible. Clifton's old, Colledge is small and weak, and Wells is just undersized. We need to overhaul that side of the line, and we need it badly.
As for DE, I don't agree. We have great DE's, they're just injured. The Jenkins, Raji, Pickett line was awesome when Jenkins and Pickett were healthy, and I can only imagine how good it would be with Johnny Jolly. Mike Neal stepped in and looks great, until he got injured. Harrell even plays well when not injured. Plus, our guys behind them have also stepped in and played well.
We need another OLB. I'm happy with Matthews, Hawk and Bishop (I actually think we should consider trading Barnett considering how good Bishop's been playing), and Hawk's had an outstanding year. However, that other OLB position is a revolving door of injuries. Jones, Zombo, Chillar, Poppinga, I dunno who else. Jones, Zombo and Chillar all played well, but we need another true star at OLB in my opinion.
We also need another CB. Woodson isn't getting any younger, and I'm still not 100% sold on Shields. Beyond Shields, we have little to nothing. Tramon is playing outstanding, and I think he'll be great for years to come, but we just need more depth at CB.