Part of the issue for the Pats is they frequently rub people the wrong way. Blount has contributed 3,500+ yards and 43 TDs to NE and helped them win two SB's in his four years playing in NE. For his effort and hard work, he received A TOTAL of $2,854,689.
Rex Burkhead has not played in NE and thus did not contribute to those SB winning teams. In his 4 years with the Bengals, Burkhead has accumulated 663 yards from scrimmage and 4 TD. The Patriots just signed him to a $3.1 million one year deal . . . which amounts to more than Blount has earned IN HIS ENTIRE TIME PLAYING WITH NE.
In this situation, I tend to agree with both sides. A lot of players would do well playing with TB, in that offense, and with that coaching staff. I don't consider Blount overall to be that special of a RB. Blount has done well enough that he deserves to be paid more . . . how much more, who knows.
They must see something in, and have a plan for, Burkhead as he represents the most they have paid to a RB since 2010. NE pays out based on what they think your market value is and the production they expect to get from you, not what you've done in the past.
But giving that much $$$ to Burkhead who so far has been a back up and not really offering Blount very much over the years doesn't sit well with Bloun. And who could blame him. But 31 other teams have had multiple opportunities to sign him and pay him more . . . and no one really has been that receptive to doing so.
Blount will likely end up back on NE, but I would guess they are arguing over a few hundred thousand dollars at this point.