I will say with JAS the most positive aspect of the performance was that he showed skills I didn't necessarily expect him to have i based on his league performances. As an avid rooster fan who has watched just about every game he has played in the NRL, I thought he would be a very hard running, physical player on both sides of the ball who could also compete in the air. I didn't expect him to show soft, silky hands and a good awareness of space. In fact, I have found him very frustrating as a League center because he tended to go looking for contact above all else. On Saturday I think he only hit the deck once when he was tackled (and had a very clean presentation for quick ball when he did - not something you'd see from many league converts).
If he can combine that kind of performance with the intensely physical side of the game (especially on D - still remember him dropping Kikau as an 18 yo) could have some player.
Equally its early days - real test for me will come against Ireland and Scotland - two teams with better coaches than Borthwick/Gatland who will have a bit of tape and a plan for him.