Honestly, I hope they add the /? command, along with the ability to add a ? after a command to see an explanation of what it did, like in FFXI. the /? in that game brought up every single command you could do in that game, and doing say /yes? would prompt the game to explain it was an emote that caused your character to nod his head.
It was an incredibly useful feature, since I could use it to find a command I had forgotten, or discover ones I never knew existed, and find out what they did.