1) Add more / commands.

Examples:

/afk (so when someone messages you, it auto replies with 'Im sry, im afk.),

/inspect <player's name> (incase you cant find them. Or does /trade let u do this as well?),

/follow <players name> (not sure if too good of an idea)

/muted (automatic turn on when u get muted, could be like a light or something above your head)

2) Have CS noticfications. (when one of your items sell or get expired)