I cannot imagine any realistic plan to replace wto with another system just excluding china.
That would have had to be monstrous coherent and sustained effort on the scale of what Russia and china are doing with bricks.
I have not seen that with either Obama or others.
Then such a replacement organization would offer what exactly benefits the rest of the world? Seems like not much so forcing other countries to join it would have been somewhat dubious.
Is US kind of like pre partition Poland where nobility had so much rights and feds so little it would derail any positive developments