allow us to Rename our empire

Well, the second part of your wishes is now doable with the latest update (Bonny Update).

In game's main screen, head over to "My Profile", you'll be able to rename your character :

I haven't tested if renaming in game applies to the persona shared here on Amplifiers, but I assume it does not, since it's linked to the Amplifier's account.

For the first part of your idea, I wish it could be done as well, that would be a nice QoL feature for immersive storytelling.