Generally I think he's fine. There was nothing wrong with the episode. And I definitely saw (rather immediately) what he was shooting for with the young kid's involvement with the MOTW being something that evoked Peter for Walter and Walter's history with Peter. Though the final bit with Walter (which I went OMG, Walter is going to _________! the scene before it happened) sort of overshadowed everything else. That will no doubt be what that episode is remember for because -- yikes!