I agree with people who say that if we think he can get us one extra win, do it. However, I don't think it is a given that he can this year. Cobb, Rodrick, and Captain Kirk(wood) have been rushing the ball reasonably well, and Berkley is still pretty young. I have to imagine if he were a significant upgrade over our current backs, the coaches would have pulled the trigger on this one already.
I think what we are seeing is part of the grass-is-always-greener mentality that comes with a struggling program. We keep feeling like we are about to break out of the funk, and so every time we hear about a new player, we get a little too optimistic about what they could bring to the table immediately. We always want to believe that the next man up is the magic bullet (Nelson, Leidner, Harbison, Wolitarsky) who will take us to the promised land the second he steps onto the field. From what I hear, Edwards is a talented young back, with impressive speed, who should make a nice compliment to our offense next year after he has had a year of practice to refine his game, and we should expect to see him bust a few explosive plays out (either out of the backfield or the return game). But if he was the type of talent who could suit up this Saturday and immediately bump the other three down a notch on the depth chart, we would have seen him on the field already.