I couldn't disagree more with the idea of trading Pickett, even if Raji is ready, which I think he is.
You need depth along your front seven whether it's a 3-4 or 4-3. Doesn't matter. Pickett and Raji play the same position, but they're both going to play a lot this year due to the rotation Green Bay uses. Not to mention, if Jenkins or Jolly go down or are suspended, Raji moves to DE and Pickett plays NT. If Raji goes down, I want a player of Pickett's caliber playing NT. You may say don't overpay for a backup, but Pickett isn't a backup. He's apart of a four-man rotation that plays close to the same amount of snaps.
Jenkins, obviously, plays the most for obvious reasons, but the other three need each other, especially as the season lingers on.
Franchise him and get him extended for probably three years. I'm guessing Pickett is pushing for four though, but they can compromise.