Hannah Aubry writes on the Mastodon blog about community initiatives including experiments to change how new users sign up:

At first, we’re planning to recommend the closest geographic server in the correct language based on data surfaced by the app store, so it will only be available initially on the Android and iOS apps. We may also experiment with other logic for recommending a server, including random distribution.

I don’t believe this will help. In fact, it might make users more confused. My proposal remains to move away from email-like user handles.