I've been a HUGE Pickett fan, he's been the glue that has the run DL together IMO, he hasn't offered much in pass rush but Pickett is that guy that's been consistant year in and year out and done the role of clogging the OL with passion and has been great for us.
That being said, seems like I'm noting Pickett less this year. Of course that could mean I'm focusing on the DL less, as run cloggers don't jump out at you. But I would be careful resigning Pickett to make sure it was a deal the Packers could easy get out of if Pickett play level drops from what it has been in the past.
As for as Raji, I don't think he has a passion for being a role player (aka doesn't have a passion for being a run clogger), and think Raji would of been better in an agressive 4-3 defense. Coming out of college Raji was a penetrator and LOVED it, and he was basically Jenkins in college making plays, while Ron Brace was their NT. But Raji didn't have the length to stay at 3-4 DE in the Packers agressive 3-4 style. Packers moved him to NT and it worked for a while including winning a Super Bowl.
But then the Packers defense lost their pass rush and MM/Capers decised to go to more of a traditional 3-4 defense (which is less agressive with their 3-4 DE) and so Raji got to pass rush even less and just haven't been the same, even in the 2-4 where Raji is allowed to be a 4-2 pass rushing DTs.
Jolly, the guy has a lot of passion and I think he clearly has another year in him, but because of his age, like Pickett, I'd be careful and not sign him (or Pickett) to a deal that would be hard to get out, because olders guys could go down quickly.