It still seems a bit premature to suggest Wilbon somehow hasn't been given a fair shake. Bryant being dinged up might be the opportunity he needs but, clearly, something has been holding Wilbon back. I'm inclined to believe it's more on his shoulders than the coaches. He's been OK in the limited playing time he has had.
Just my opinion, but that fall/tackle didn't seem too out of the ordinary. It might have been a little weird. That said, I think a pre-existing condition had a lot more to do with it than the number of carries, but one could certainly make the argument that the more carries you give a player like that the greater the chance of aggravating the injury. I thought it was strange that particular tackle resulted him having to be carried off the field. I haven't seen that happen very often.