My suggestion is to add a "free for all" room which opens 24 hours a day, 7 days a week.
The map is randomly chosen each week, and is changed after a week has ended
Anyone can join this room, no matter what level he/she is at.
The room may have an option to allow same characters to play in the room or not (e.i, everyone who joins has to choose an unique character, or even 10 Alicias are allowed in the same room)
Respawn point is random after death,
There are always Huey, Juey, Duay in the room so that only 1 player can have his/her own fun.
No EXP or Gold is rewarded for playing in this room. EXP and Gold are exclusive to missions completion.
Players can change weapon when they die and wait for being respawned (each character currently has 3 weapon bags to choose from)
Players can leave the room anytime they want, and vice versa assuming there is an available slot to join.
Thanks for listening.