I think there should be Utopia U21 and NTs.
I understand it's not a real country, but it's a real country in this game. I read somewhere that said the reason there isn't is because having managers from all countries would make it too powerful. I would argue the opposite, it seems much more likely that people would train a player from their home country on their utopia than vis versa, I know I would.
The only way I could see it being a problem is if Utopia became larger than the largest countries, but even then, you could split the country in 1/2 and have a utopia blue and a utopia red or something like that.
So another thing... Utopia.... significantly... and I mean SIGNIFICANTLY less likely, to have top prospects end up on BOT teams, and get nerfed.