One of the big beefs I have with all this is that the South Slavs pretty much have no say in their present and future lives. UK, France and Germany are determining what is best for them, particularly their borders. This will only lead to more war.
The Congress of Berlin (1878) gave the Austro-Hungarian Empire effective control over Bosnia-Herzegovina. This lead to annexation in 1908, the subsequent assassination of Archduke Ferdinand, WWI, WWII and the Bosnian wars of the 90's.