Yes, that's right.
-Skin and hair color are not well distributed, but it's not a massive problem. They still resemble human players. They could fix it, based on official records, but it's not a big deal.
-Strength of national teams is definitely not a problem, furthermore, I like it. It's basically an alternate universe in which managers themselves contribute to their national teams.
Utopia nationality is a big problem because it directly interferes with ordinary BB users. For the sake of realism, I don't want an imaginary nation existing on Earth. I can have French or Chinese players on my team, that's realistic. But having an "Utopian" player? Where is he born? What's his native language? Esperanto?