I really wish more games implemented its MumbleLink API for positional audio between clients. https://wiki.mumble.info/wiki/Link
For example, GW2 implements so people sound relative to where your characters are if they are on the same map. https://wiki.guildwars2.com/wiki/API:MumbleLink
The API has also allowed for other tools such at GW2 Tactical Overlay (http://www.gw2taco.com/) to present additional positional information.