You can think he had a terrible WJC and still think he's an excellent prospect (that is how I feel).
Honestly it's better to realize that he had a terrible WJC and analyze from there rather than go 2014 Mike Richards defense and try and hype him up "Oh my god did you see that backcheck", "Nice play chipping it out of the zone" like many did here (BigKing touched on ppl doing that in one of his posts)
He's still a very good prospect but he has a long way to go. The poor WJC might be a blessing in disguise for both him and Caufield, might prevent either team from doing something insanely stupid like trying to sign them and stick them in AHL as teenagers. I know it's been a decade since we had a prospect this good, but Kings fans need to be patient and realize this isn't a turnkey bluechip NHL player, it's going to take some work and development.