Trust me, I am no big fan of Discord I could give you MANY rants about them. BUT you also may not know that, at least for win users only, they provide an "overlay" right in-game where you CAN participate in FC chat (or any other channel) in Discord WHILE maintaining at least a look at what may be going on in the game. It is not atypical for any FC to have more than one group participating in group chat for different content and you may see separate voice channels for Raid 1 Raid 2, Dungeon 1, Dungeon 2, etc. You say you do not mind a voice chat channel for groups doing content together... the game does not provide anything that can accomplish that.

A well know streamer (Zepla) maintains help/support channels on her Discord, some of which seem to be monitored by the most experienced players for significant periods of time. I HAVE been flying to some destination, had a game related question, popped into the overlay while keeping an eye on my flying, asked the question to see an answer literally seconds after landing.

Not a bad system. It's not just the FC, there are more than one Discord servers for every race and class in the game... many of them supporting even savage raiders.