my take on it is that if walters was held back for the first game it was just as likely that he would aggravate his injury against belgium. given that a result in the first game was so crucial, starting him there was a calculated risk.
i would agree that not bringing another striker - or a different one to murphy - was perhaps the wrong choice but we might end up needing all the bodies we brought regardless. i think it's to our advantage that italy play sweden tomorrow. ideally italy win that and then rest players v us...