Wasn't a total waste, but my impression is that Capello never really fit into the role. The sterile, ultra-authoritarian nature of the WC preparations seems to do anything but help the players focus. He made some interesting line-up choices and helped Rooney by playing him 'in the hole' which soon caught on at United, England certainly played better at first, but he made some strange personnel choices too. He never took the next step, getting the settled team to work with serious chemistry and understanding.
Probably should have just gone after the Italy job.