Characters/Account:
Auto spawn some sort of donation/special weapon (4 hour items to storage?) after creating an acc. Or when they reach x amount of kills. Popup message box will display when user enters lobby/gameroom.
Chat:
In-Game chat can be scrolled
Game Modes:
Team Quest - Red vs Blue team. Whoever can either beat x stage faster wins or judged on most kills/damage. Exp gained from npc kills and if the team's stage is won. Players will be randomly chosen into a team (balanced)
Gameroom:
Spectator Mode (gameroom options) - Enable
Voting (gameroom options) - Enable it so we can disable the use of kicks
Option box for room tags (check boxes). Can't really fit any text with multiple room names in title
Option for team shuffle. Option only enabled in team gamemodes. Teams will be randomized every round. (Balanced)
Clan:
Clan messages. Have a clan message displayed to clan members when they log in
Clan control panel so we can kick or promote members on site.
Clan logs - Who gets kicked, promoted, added, etc.
Hopefully you take these ideas into consideration, i have not seen any server with majority of these ideas so if you do choose to use them i am pretty sure they will make this server really fun.