I think this would be a smart feature, but I don’t think we’ll see it.
Every move re: chat makes me think its function (to the devs) is to keep player engagement inside the game. I believe they believe if they support interaction outside of the client, people will play less. Even though as far as I can tell there is practically no guild above the top 50 that isn’t using Discord over Global Chat to coordinate. Heck, my 8-member random guild I joined early said “don’t use guild chat, use facebook instead”.
But too be fair, they have access to data I don’t.