If there was something to be done, I'm sure it would have been done already. It's not a matter of TG just 'deciding' to do something. At least if you move to the NA servers, you'll get proper support and, assuming this gets resolved someday, you can go back to Unity.
Some people have expressed a fear that GN might keep the game DB, meaning they'll lose their characters. If that doesn't happen, fine, you can go back to your old characters. If GN does keep or scrap the game DB, then you'd have to start over anyway.