I would call the Hapsburgs clever not cowards, they managed to maintain their empire for over 800 years and were almost perennially at war. By the way despite the strong assertions of
@Magyar1988, there was a strong movement for "Monarchy" in Hungary in the 1920s and pro-Hapsburg movements, that is why- Admiral Nicolas Horothy was declared -REGENT and not as King or Dictator or President etc. Of-course, once he became Regent, Horothy was loathe to leave the throne and even made his son the deputy Regent.
In the Austrian Empire which lasted till 1867, the Hungarians, Croats and Czechs had some autonomy and from 1867 onward, the Hungarians had a lot of autonomy but the Croats, Poles, Jews and Czechs also had sizeable amount of autonomy. In light of that, Croat lands giving Hungary cores will become weird, but Transylvania getting Hungarian cores is natural.
The population distribution in Austrio-Hungarian Empire was slightly above 25% German and slightly below 20% Hungarian approx with the bulk i.e. over 55% being the others which included- Czechs, Poles, Slovaks, Slovenes, Croats, Serbs, Bosnians, Italians, Ruthenians (Ukrainians), Romanians and the Jews.
This meant that it became a multi-ethnic cauldron quite similar to the Russian Empire and its successor the USSR but unlike the Homogeneous nation states in Western Europe like- Germany, Italy, France etc.
Post WW1, with newly found Independence, the chances of a - "peaceful re-alignment was beyond impossible" and even a conquest would have created a lot of tensions though no one state had the wherewithal to conquer all the others. Though with the combined horrors of WW1 and WW2 and the further communist ruled iron fisted rule in many of these states, a substantial part of these people would have wished for a Hapsburg to rule them. Hindsight 20/20 is a strange thing.