Well, if somebody ask me, why do you play in Buzzerbeater? I'll answer: identity. I enjoy being the first on my country who get some achievements: Cups, Leagues, NT goals. Against the thoughts of many can be difficult to stay in the top for a long time. But, the best thing is to train a player for your NT. I can't describe you what means see your player in the National Team.
But, can I feel it again in a merge country? The honest answer is "maybe". But, I don't think that the users of micro nations (like I am) want to lose their identity. So, we can begin the fusion without lose our flags, and trying to create the leagues keeping in mind the nationality of the users and not just randomly. Only when you get the high level you will face foreign opponents
In that order, the National Page can show wich is the Best Team in Cup and wich one is ubicated in the most high league. Long time ago, when I used to play Hattrick (I hate to make this comparison) used to exist some regions inside nations. My idea is something like that.