It was not a 50/50 call.  Barrett grabbed his arm in the air, if you want to compete - taking out the man ->Penalty, 2nd he lay on the ground over Savea with no attempt to roll away So even if it was a legitimate sack (it wasnt he was in the air) he is required to roll away and he did not ->Penalty.  When did you last see an unplayable ball call from a lineout?  Just watch the replay and say those two things didn't happen. 

As for the reason to going for touch, why would you not?  Possession 5m from their line, what is the benefit in going to golden point where possession is decided by a coin toss and then taken on the 22m line in your own half.  One has to expect better from the officiating.  If you are going to remove captains challenges then they need to do better.

Arguments about what way calls went previously are irrelevant, the discussion is about the last big call of the game, and the failure to officiate two basic parts of a throw in.

Edit: just watched it again and he should have been carded for lying on that side of the ruck