The thing is it was introduced as "no more clear and obvious errors" and no-one had a problem with that. Let the referee referee, but if the ball is a yard over the goal line like in that United match, call it back, Maradonna's hand of God, nobody in the ground knew how a midget outjumped Shilton, call it back, Henry's handball goal against Ireland, bring it back, offside by a yard like Walker that time against City, bring it back. But somehow it has morphed into a quest for absolute truth with the interference of FIFA and it's never going to work.
The more I read about what IFAB have said, and are still saying, the more I blame the federations and the national associations. Sort it out, tossers.