Yes, I think if this were implemented that both teams should be able to use it for sure. The quality-of-life would be boosted more than people would think with this command. I really hope it gets added.
My suggestion is to add a feature/command to the JB server where anyone can use it so that everyone except the active warden is muted in voice chat. It would be very useful to have an easily accessible command to mute all but the warden. It's nice sometimes to just tune everything out and focus...