Yeah... doing it the way i wrote would be the pleasant, friendly end to the empire, the less pleasant one looks more like the occupation of the Rhineland.Well, maybe; but personally I find it very hard to picture an Austria strong enough to impose that and yet not strong enough to simply reconquer Bohemia/Moravia.
The bottom line is that without outside help (like a peace treaty and the French watching over it) secessions only can succeed in weak states where the power of the ruling body doesnt reach far even in peace time, A-H is fairly compact and any place can be reached within a day.