Chiming in about the USA opposite situation...
To be fair, while the NCAA does produce excellent opposite hitters, they seldom play back court. Because of the college system's ridiculous 14 substitutions (or however many) per set rule, opposites are usually subbed out as soon as they rotate to serve. So, generally when these young, talented opposites hit the pro/national team market, they really don't have the skills to hop into the national team -- no defense, no serve, no major experience playing 6 rotations, etc. Furthermore, coaches on NCAA teams are less inclined to put their most talented players in the opposite position. Typically, the stars are 6 rotation outside hitters. I actually think this one of the most defining aspects of the US's game. With exception to Hooker, I can't remember a single tremendous opposite out of the US. Sure, Haneef-Park, Murphy, Lowe, Fawcett, and others all had their moments (IMO Fawcett more than the former names), but not the defining, exterminating threats you see arming Brazil, Serbia, China -- hell, even at points in the DR and Italy! The US just seems to use their opposite differently than these other top teams do.
Enjoying these matches so far! I have been a delinquent fan this year and didn't follow the club season, so I feel extra pumped about seeing my favorite players again. It was especially thrilling to watch S. Korea against China. I haven't seen them play like that in years! They looked so well organized, competent, and happy! China is extraordinarily talented, but prone to bad days. I'm sure we'll see them back in top form in the coming weeks.