Personally, I think Finley is more important than just about any other target we have available to this offense. I think Quarless could be a poor man's version, but what Finley (and guys like him) do to a defense is vital opening up other holes in the defense. Once he started holding onto the damn ball defenses started to roll coverage to minimize his effectiveness.
His speed size ratio and athleticism make him a game changer.. not to forget that he will be in a contract year and motivated even more.
I think keeping him, even at the number if need be is more important than bringing Jennings back. IE I think it will be easier to replace Jennings in this offense than Finley.
Now if the right talent at TE falls to us in the draft.. I very well might change my mind and flip the other way.. but as of right now, Finley brings something to the table that we currently lack even with Jennings.. a match up issue based on the raw player talent over scheme. Yes.. even Cobb has to be schemed in with movement to scare the defense.. once he improves the crispness of his routes that may change as well, but currently the Packers have to use scheme to help him get loose. Whereas Finley can push a defense by his raw talent and body type from traditional TE spots or simply moving him wide.
I think the Packers hold onto him until they have a replacement option on the offense.. a guy that snap in and out can be a match up problem for the defense as an individual. Whether that is a elite receiver or another TE that can create the same type of issues for the defense.. maybe with a little be less of the "drama" that seems to follow Finley.. in which most of it is created by the media more so than him. Finley is the classic case of a guy that would benefit from a change of scenery and a chance to drop some of rep that has been attached to him.. even if the comments were from a couple years ago.
"The oranges are dry; the apples are mealy; and the papayas... I don't know what's going on with the papayas!"