Hmmm this is designed to address the particular scenario and it does that, but I don't believe it avoids others. Taken to stupid absurdity say Aus had been trailing by 4 instead of 2? The same things happens, but Aus have to kick for the corner to gain the points required. They set the maul and score the try. You've stated that you think its defensible, based on Scotland's performance it pretty much wasn't! A wrong decision that confers advantage is a wrong decision regardless of the outcome. For me I'm entirely happy with a situation where a human referee on the pitch carries primacy regardless of the "wrongness" of any decision. That's where World Rugby have screwed this for me. Once a decision has been made by a referee to the best of their ability it is "right". Joubert is not a cheat. He's not called it wrong on purpose. He's a man doing a difficult job. That's how sport is. In my view it is literally impossible to ref a RU game correctly. Are you really going to look at where McCaw starts at every breakdown? Are you really going to look each time a Welsh players flaps about on the floor pretending to get out of the way? Are you going to check to see if Stuart Hogg is actually being fouled or acting like a massive Jessie? Are you going to check if Owen Farrell has bothered to use his arms in every tackle? The cumulative effects of minor infractions is massive. The best play at or over the line pretty much all the time. Rugby Union ain't black and white. It's like 10,000 shades of grey, but without any shagging. Well mostly.