There would indeed be an obvious risk of China suffering greater losses.
I do wonder what might happen with Korea, if you have a more active France not too far away.
German-Polish relations would certainly be even worse, critically without necessarily making Poland stronger. I mean, an intact Danzig would keep Poland from building up Gdynia from nothing, but that is the only clear advantage I can see.
It does occur to me that the survival of Diana might pose theological problems for Charles. OTL the death of Diana meant that he could marry Camilla without any problems as a widow. What would Diana living do to all that?
(As head of the Church of England, this would also cause him political...
Agreed. The growing consensus, I think, is that the Charles and Diana and Camilla triangle was doomed and disastrous and was forced upon them. Charles and Camilla should have been free to marry each other and surely would have, while one can only hope that Diana would have been able to find...
The problem with Spanish Santo Domingo is that of Haiti. How do you overcome Haitian opposition to a European imperialist restoration on Hispaniola? Even France was not able to do it.
Alternatively, WI you avoid the Korean War altogether? Without the devastation of that war and later radicalization, maybe you could have a more nornal country.
It is not clear to me that an Austria so notably reduced would be capable of going to war against a neighbour, at least not successfully.
I am also curious about how Hungary survived versus Russia.
I once played with the idea of avoiding a Great Migration by having black people in the South get locked down in serfdom-like conditions. Not sure, now, how that would work.
Beyond that, I think a relative lack of immigration restrictions would work, by allowing previous migration flows from...