Would be nice to have the ability to set prefered chat command, so we don't really need to write everytime /w, or /s which kinda gets annoying if you're talking with somebody in game.
Would be like this, if you use /setwhisper or /setw and type something in chat it will only be (WHISPER) or /setshout (/sets) you will only shout. Using /setchat will set you back to the mainchat.
As well as this, why not to add /carwhisper (/cw) so player who are in your car can hear you.