The first whistle-blower who announced the split on Baidu Tieba in early April reappeared earlier. He (or she) said the split decision was made BEFORE this year's worlds. He (or she) attributed the decision to Zhang. I don't want to be lectured by other posters on this topic again. I just relay the information and you're free to decide for yourself.
I have seen that too. Translate what he or she said witin 【】:
whistle-blower: 【Zhang Hao was unsatisfied with his partner and it has been planned for a long time to choose another partner for him. Teams of provinces tested several girls, not only Yu Xiaoyu. It has been decided before the 2016 WC to switch Yu and Peng. This decision cannot be changed since it was made. The arrangement was made mainly by the pairs coach group. The Fed leaders did not approve of the proposal at first. But pairs coach group insisted and the leaders agreed finally.】
A: Was the decision mainly made by coach Yao Bin and Zhao Hongbo?
whistle-blower: 【Coach Yao Bin seldom manages things now.】
B: So the tryout for WC within team China was obviously disgusting. The judges couldn't be fair.
whisle-blower: 【The tryout didn't relate to the switch directly. But maybe the resluts of the tryout reminded them of unexpected possibilities.】
B: If the so-called tryout selected Yu/Jin for WC, Yu/Jin might attract more attention from fans abroad. Once they got a good grade, how would the switch have proceeded?!
whistle-blower: 【A decision was a decision, which was not related to the attention. The most important were the grades. They daren't wager on the spots of next season and did take these kinds of things seriously.】
C: 0.06 points was such a subtle diffrence. Theoretically speaking, Yu/Jin did better than Wang/Wang in the past so it would not have been difficult to choose Yu/Jin instead of Wang/Wang. How could they choose Wang/Wang and Peng/Zhang since they considered the grades first? They did know Peng/Zhang had practiced for only three weeks!
whistle-blower:【They had no preference between Wang/Wang and Yu/Jin. Neither Wang/Wang nor Yu/Jin must attend WC. Neither the two was obliged to quit WC also. Both of the two pairs didn't get the definite support from the coach. The intention of the tryout was to choose the best pairs for WC including Yu/Jin. Yu/Jin were of course expected to perform at a level matching up to the WC either. 】
D: So this was what Zhao Hongbo did!
whistle-blower:【 Peng Cheng was chosen by coach Yao Bin by himself. Yu Xiaoyu wasn't.】
Warnings: These above are just whispers. I just translate and cannot guarantee the credibility of the information. Just as a reference.
(I hope my poor English can be understood.)