I'd advise against it at this time. We're already a bit fragmented, and we're not going to just hard switch to a different voip app. So dragging half the community to discord to maybe get more pubg people in seems like a bad idea for the community as a whole.
Our discord is still up, and every time I attempt to use any discord I switch to text chat only. I've yet to run in to any discord people who've setup there Mic correctly, or even use the desktop client.
Hell most of the discords I'm in are for text chat only . So put simply if we switched to discord I'm sure most people would just stop talking all together.