Overlay controlled private voice messages during a group chat

I would like to be able to initiated a private voice "whisper" during an already active voice call.

Currently, when I want to inform a player privately via voice of something I have to either privately call them (leaving the old call) or alternatively move them to another channel which breaks immersion and allows everyone else to know "something" is happening. 

It would be helpful that without having to open up discord (via overlay if possible) I could configure a key to allow me to direct my voice so only the required person(s) hears my voice without having to change or move channels. 

Essentially dynamically controlled voice whispers inside of an active call.

For example - 5 players are in a voice call everyone is talking, I hold down my configured key (shift etc) which brings up the list of people in channel and click player 3, while I do this his name is highlighted in a unique colour or symbol showing it is private. and I speak - They and I are talking directly to one another, but the other players in the original call are unaware I am doing this, and no one moves or leaves channels. 

I believe this would be a great feature to draw in more Nitro subscribers were it a Nitro only feature, or perhaps a feature of X amount of boosts on a server with configurable access. Perhaps the idea can be expanded so multiple users in the same chat can be "whispered to" at once. (Shift and click relevant parties - double click shift to turn off) it would mean a lot less management of channels and shifting players mid game into different areas of a Discord server to have private conversations.