I don’t think there is any need to do any design for pvp in the future, and the pvp mode just can be realized with friendly damage.
You only need to find an empty boss room or open space when you are online with your friends. Discuss what kind of weapon to use.
There is no need to set up a complex arena or game mode. Everything just needs to be discussed with your friends.
In addition, this is not a competitive game. The pvp mode is just to fight with friends for fun.
The problem is how to lock your friends like the enemy.
Too cumbersome and complicated settings will make people feel troublesome.