Hey, thanks for your review!
For the first one, I don't overwrite commands at all, the only command is /tnttag or /tt.
You need to execute /tnttag leave as the player when they execute the lobby command.
However, I can add it as a feature that you leave the game automatically when you go to another world.
Please suggest it on
https://suggestions.juriantech.nl and I'll look into it.
For the second one, you need a waiting lobby and a exit lobby, right?
Please discuss this further in the discussion area, this is only for reviews :)