Discord is okay as an "all in one" package, but purely for voice communications falls far behind alternatives like Teamspeak.
You mean an open source alternative, because TS is already self hosted.
In my experience, this improves the quality of every conversation. They just flow more naturally.
I wish other solutions would prioritize latency. Skype went very noticeably backward after they switched away from P2P.
I also have everything I want hotkeyed, so I still think that "far behind" is a huge stretch at best.
http://www.armaholic.com/page.php?id=19324 https://www.youtube.com/watch?v=3N1q4NgyCMs
That's alone is my biggest wish out of Discord.