RB is not a need at all. Redman, Dwyer, and the new horse, John Clay, are more than enough. Plus they get the good-looking rookie Baron Batch back from injury, who should replace Moore as the 3rd down back.
IMO Mendenhall is completely expendable. Even more so now that he's damaged goods.
DL is definitely a need with Hoke retiring, Aaron Smith probably retiring, and Keisel and Hampton very near the end of their careers. I would love to get a stud that can play the run and put pressure on the QB, but that's asking for a lot with the 24th pick. I'd rather see them take best OL available (other than C) at that point and pick up depth for DL later on.
ILB is also a need, because I think Foote and Farrior are going to be released as cap casualties, leaving only Timmons and Sylvester as incumbents.
On the outside, Harrison is getting up there in years and Worilds has shown next to nothing. He's earned the bust label from me. So there has to be some consideration given to OLB as well.
In the secondary, Troy and Ryan Clark aren't getting any younger. They need some youth at safety. Corner is pretty well set with depth, so I'm not expecting any picks to go in that direction.