Let battle royale spawn naturally

[CalliopeSoups]

Battle royale is a pretty popular gamemode for classic nerds and would benefit from being played more, since you can often die pretty quick and the mode is good fun and practice. I think it's received enough balance PRs to be brought into the main pool of classic gamemodes, possibly the same chance or rarer as nukies?

Do mention any gripes you have with the gamemode cause I could always fix small things myself if given ideas.