My views on Edge arent simple:
On one hand, I beleive that his lack of the breakaway second gear "robs" the Cardinal running game of .25 to .3 yards per carry average that many other teams get. Edge just doesnt get that occasional 30+ yard burst that pads the yard per attempt average.
I would love to add a younger, more dynamic runner that can be around with Matt, Fitz, Q, etc
I also think that when the Cards were eliminated from playoff contention, Edge turned it down a notch ( a small notch, but down none the less)
At the same time, I recognize the tough work he does and how he always seems to get that last extra yard out of his carries when engaged in traffic. Picks up the blitz, etc.
I also remember thinking the same thing about Emmitt's last year -- how he had lost the breakaway gear and that the Cards needed a better RB to improve their running game -- that resulted in the JJ Arrington experiment that went nowhere.
I dont think you cut him. If you can engineer a draft day trade, then maybe --- but I would be happy with keeping him and bringing in his eventual replacement on draft day.