China losing that 3rd spot at Worlds has got to be a wake up call for the Fed about the disconnect between the 3 great pairs and the up and comers. I am sure they are doing all they can to maximise S&H's competitive experience, accomplishments, ISU points / ranking, judges impression, prize money, training opportunities and so forth to allow them to be the next great hope for China, or at least for the time being, a team good enough to support either P&T or Z&Z should one of them get injured or retire from now til Sochi.
If S&H can physically cope, I think this is a good strategy. China doesn't have the time to let them grow slowly and to be frank, they are not very good skaters at all. Yet they need to shoot to the podium right away if they want to contend for a medal at Sochi and there are only 2 more Worlds before then. The only way to fast track this team is to let them accumulate medals and titles.
If Z&Z fully recover, I totally believe the 2 teams going to Worlds this season will be Z&Z and S&H. S&H will probably also go to every single 4CCs from now til Sochi. P&T can rest until the Sochi season.