I believe Alshon's injury is tied to his calf as well. Which if both are ailing, there is not much you can do. The calf is actually harder to run on when injured unless you run flat footed.
To me this may be better salary cap wise because there is no way he is going to get AJ Green type money (4/$60mil) or Bryant/Thomas type of money (5/$70mil). Maclin just got 5/$55, so I would assume Jeffery's high is going to be near Maclin's $11/yr and a low around $9 (which would be the 13th highest WR contract per year). So shooting darts in the middle, that is about $10mil a year over 5 yrs.
We have enough cap space to extend Jeffery, Long, and re-sign Acho, Jenkins, and Porter to new deals (as long as they keep up their play).