IMO, you're being a bit stingy with your praise.
Firstly, his try wasn't just a good try, it was excellent, and to me, it showed some of the skills that will make him a very good RU player. At the beginning of the movement, he ran with the ball in one hand, then as he was about to be tackled, he drew the ball up to his chest to protect it from being bumped out in the tackle. Then when he had the tackler beaten, it was back into one hand again, allowing him to stretch out and score. It was a classy bit of skill on is part.
Secondly, one of the things that really impresses me about SBW is his passing. His passes are long, flat and accurate, and he appears to be able to pass equally well in both directions. Seemingly every pass arrives at the receiver in near perfect position, chest-high and half a metre in front. I have yet to see him throw a bad pass.
On the down side, he does not have a real kicking option. I'd like to see someone like Foxy to get alongside him and teach him how to kick. He is skilled enough and coordinated enough to be able to learn.
All in all, I think he is well on the way to showing that he will be good enough to go on the EOYT.