I would really LOVE for /o Officer Chat to work. Almost a requirement in dealing with Guilds!
Officer Chat is NOT Working...
There’s an officer chat!?
Anyways. Most guilds worth the bother will have a third-party means of communication. TS3 is free and fairly easy 
(I know, as I run my guild/clan/squad’s server stuff)
The problem is GW2 has a user-defined rank system in guilds. If they added it, it wouldn’t be “officer chat” per se, but “privileged chat” and would have to be a yes/no permissions option you could assign to a rank.