Strength of schedule is calculated from the opponents projected fantasy points allowed for the RB position. The best rating is +16 which gives the player the advantage against the defense and indicates an easy opponent, the worst rating is -16 which gives the defense the advantage and indicates a tough opponent.
Expecting the Patriots to resurrect the career of Blount, a la Corey Dillon seems unlikely given all the talent that already exists in the Pats backfield. Blount took a pay cut after joining the Patriots and will need to show up to training camp in shape and motivated if he hopes to keep his roster spot.