Suggestions

Creating a Gamemode named something like "Nexus"

Basically , There's 4 teams , Which there are maps with a beacon in the middle of theses bases.
You have to get stuff from ressources nearby (Trees , Stone , Ores) , but thoses ressources re-appear after 5 seconds or so.
You have to attack the opponents's Beacons with a pickaxe with a set health. ( Beacon could have like 200 Life before death. )
There also should be kits , Sign Shops .. See more

Command /block

It's like a command to /block ( mute ) people talking or Private Chatting you.