I'm not sure if Discord integration would be an advantage for general gameplay, but if there were a Discord server for AH, I would join for voice and text chats as well as news updates.
I think it would be advantageous for squads to have their own Discord servers. That way, everyone can be in the same Discord voice channel when on a mission. Also, it's a great way to keep all of your squad communications in one place, and you can send push notifications as reminders for squad nights and special events.