Historically, Youngs has always been capable of looking like the best SH in the world. He's also always been capable of looking like a worse SH than me.
His problems are typically exaggerated when he has to be a play-maker - asking him to make the tactical decisions puts him in 2 minds, and he dithers, becomes slow to get to the ball, and slow to get it away once he is there - which puts his passing - often a little ropey, if not often terrible - under even more pressure. When he just does, without thinking and without second guessing himself, he's a far better player IMO.
Against NZ, on first viewing, he looked like he was having a poor day at the office - not terrible, but poor; and his history meant that when someone else played SH, or he made a dodgy pass or decision - it really stood out in comparison to everyone else who was raising their game for the occasion. His history of being slow, indecisive and often a bit crap, meant that people (myself included) went OTT in criticising him, as we saw history repeating itself.
On second viewing, it looked like it was a tactic that he wouldn't always be the man getting the ball away - whoever was in the best position to put speed on the ball would do it - and with 2 FHs on the pitch, you can do that a bit more, as the main reason you don't want the FH doing that, is that they've no FH to pass to. So that entirely invalidated the biggest criticism people had of him during that game. But quite honestly, most people needed a second watch, and calmer emotions to see that.
He was still pretty anonymous; but anonymous in a 5-6/10 way - not anonymous-with-mistakes in a 3-4/10 way that it seemed watching live.
Same goes with Faz during that match - he was anonymous, in that he didn't nothing much of either highlight or lowlight - and because I wasn't noticing him, I kinda assumed he was having a poor-but-not-terrible game due to my personal bias. I was mentally giving him a 4/10. He wasn't though, he was going around being a decent enough IC, playing an IC game with IC duties, and quietly getting on with things; bumping him up to a 6/10 - which his "leadership" qualities bump up further to a 7/10.