Well he had an incredible year, except for the games when he was simply attrocious. The interesting "too much number crunching" stat on Rex is he had the second most games with a QB rating over 100 this year, and also the most games with QB rating below 50. Rex runs hot and cold Maybe he'll get better, maybe he won't, never try to predict the future when it comes to talent it's a fool's bet.
"...never try to predict the future when it comes to talent it's a fool's bet." That is exactly what the Draft is based upon and the success of some general managers, Pittsburg's especially, shows that some people can do just that.