Precisely, and until all GPS approaches (most particularly those with a waypoint half way down the approach) have VNAV then more LHR type accidents are only a matter of time.
Nah sorry, can't follow your logic! LHR happened because the crew did not follow the procedure as it is writ - simple as that. Time has proven that the @#$%wits will always find new ways to kill themselves, and unfortunately, unsuspecting others!
Dr 