Private servers having an option in the settings tab to turn the server into a "PVP Server" which would automatically turn on the best settings for minimal lag (example removing npcs, always days etc) and would give a prompt to the person who is knocked to get tped to the nearest heal pad. There could also be arena which gets activated when the option for PVP Server is on where here are two pads and whenever 2 people stand on the pads the that area would be enclosed starting a pvp match without any interference from other people and at the end would declare the winner. This can be very useful in events as well.