I know what the response to this question is going to be, but please hear me out.
Kris Jenkins has proven to be one of the best nose tackles in the NFL and should have plenty of trade value considering that some defenses (ie: Bills) are turning to the 3-4, he also has missed a lot of games with injuries. I think that trading him in order to get enough value to trade up to get some one like Nebraska's Suh or OU's McCoy would be the best option. Maybe even just trade him to the Raiders for Asomugha.
The defense proved that it can play without him and adding someone that is younger or at least healthier would be better. Not to mention what adding Asomugha would mean for the defense overall. Finding a way to get this team better is a given, trading someone that hardly contributed on the field is the way to go. I know what he can do but I also know what we can do without him. But in order to get that line younger and healthier the jets definetly have to trade him.