Smaller nations seem to be happy with their leagues.
I would say the smaller nations are very different. Some are unhappy, but merging with the wrong nations is even worse than the current state, so they might be against any change.
Some are happy, because they have found a way to be successful enough while being challenged to a certain degree that fits their expectations.
I'd be much happier in a big nation, but many Austrians, don't want a change. It feels like flipping a coin would be the best way to decide.
Größter Knecht aller Zeiten aka His Excellency aka President for Life aka Field Marshal Al Hadji aka Lord of All the Beasts of the Earth and Fishes of the Seas aka aka Conqueror of the Buzzerbeater Empire in Europe in General and Austria in Particular