@macdeffy You can now name it
kyros.nxt - it is accepted with the patch we just released. Please update your guide to prevent confusion. Note that this doesn't mean FAF officially supports the custom lobby - it is still up to its maintainer to keep it compatible.
If anyone is interested in improving the lobby - please contact me. There is no need to work on a custom lobby if you can just improve the actual lobby that ships with the game.