The Croatians? I was under the impression that the Croatians fought very enthusiastically with the Austrians against the Hungarians during the revolution. If the Hungarians somehow manage to break away then I certainly can't see them taking the Croatians away as well. Which is going to make it interesting for the Hungarians considering this will effectively leave them landlocked and sitting between the Ottomans, the Austrians and the Russians.
Sorry i confused with Checz and Croats.. and completely forgot about the Polish in Galizia.
For the Croats...depend, they still live pretty well thanks to Austria Trade(alongise Venetia) but they would act in their own interest..maybe a Austria-Croatian Kingdom in case of the Hasburg lose Magyar?
Checz will try but the german in Bohemia and Moravia are nuts very hard to crack and they will be when the whole austria attetion will be(alongside italy)
Krakow-Galizia...depend, they were unhappy but the worse chance would be the Tsar...they will play nice with Hasburg until the smoke goes clear... maybe joining with the Magyar to live with those isntead the worse of Russia?
there a lot of butterflies, measure will net an excellent domino effect and butterfly net