Hello, it's the author. To answer your question, no. There is zero benefits for making them a noble in the story. And in realistic event, that would likely to create chaos. Eisenland has a unique governing system that would be revealed later in the story

Good question, more information will be revealed as the story progress. Right now, we are in what I call "Homeland Arc" and are close to ended. The next chapter would reveal more information about the 'Empire'. Since the next arc would focus on making contacts with the new world nations.