On the scrum stuff, at the time watching it live it looked like the SA lad was binding on the NZ arm, which was causing the NZ elbow to fall.
In fact in the video @petite posted you actually see the bind move from the shoulder blade area at the initial hit to the upper arm in both instances where you can see that area of the scrum. So if you want to be pedantic, in those instances should have been a penalty to NZ under 11d.![]()
While I see what you are talking about and had the letter of the law been followed it could well added to the penalty count.
I tend toward supporting the refs actions of letting play continue as neither incident prevented the team with the feed from getting good clean ball thus speeding up the game.
I guess where South Africa had the feed a penalty to NZ may have been warranted but if these things had been a genuine concern to either team they would have raised it after the match although I can't imagine either coach going full on Cheika about anything.