If you kept up on all my other posts on Maroney over the years, there is also something else going on with him beyond the shoulder injury. What that is, no one will talk about, but I can confirm that he has other issues unrelated to his shoulder that are not injury related. I have poked around for answers to this for months and no one will tell me what they are and whatever it is, those that know have been sworn to secrecy. Can't explain it anymore than I just did, but I have been told that there are other things going on with him.
He returned 28 kicks in his rookie season in 2006 and hasn't done it since. Of players with a total of 300 or more carries over the past three seasons, Maroney ranks 19th in ypc. He clearly has physical issues, plays soft, and has not gotten a reputation for not playing particularly hard. Whether Maroney is worth a 5th or more really doesn't make much difference at this point as it's unlikely he will be traded, but there are other RBs that are either free agents or coming in as rookies that teams would probably find more attractive with less baggage.
I would guess Maroney's fork in the road will be this season, as he will either start to be a productive and reliable back or he will be done with the Pats and have to test the free agent waters. He's still very young and would benefit benefit from being in a system that fits him better, so maybe he will get a better shot on another team once he's done in NE.