i dont know much about voice options other than it will be a thing in game. but for like guild announcements, news, etc, that is already in the player UI, watch the company and faction video you can see the options in it and on 17 patch notes theres an image. the rank permissions for a company shows where you can disable members from alter the MOTD, Company Bio, News, and Info.
EDIT: Also if you look under the drop down window on the image above, you can see Officer Chat Speak. So right there shows if its not ready yet, multiple chat channels will be and maybe even voice chats.