As for the writing, I guess when judged from the standpoint of a former player, it's pretty good. Certainly Price is a better writer than Matt Bowen and possibly better than Ross Tucker.
As for Rex, I find him to be a very likable guy and I think he's really straight forward and not terribly complex. What you see with Rex is what you get.
As for the thesis of the piece, Pryce seems optimistic that Rex will fix his fatal flaws. I wonder why he feels this way? It could just as easily be concluded that Rex will never change. Possibly Pryce takes the optimistic view because he likes Rex.