You'll never know the exact reasons unless you sit down with them and discuss it. Even after that you may feel you are more correct in your way of thinking than them their's. Personally, I would tend to trust their judgement given knowledge of all variables involved than anyone completely on the outside looking in.

One thing I do know is that Peat has been forced to play through three fluke broken bone injuries which had to have affected his effectiveness. Warford was just slow and out of shape.