The function to warn you when you talk while having your microphone muted looks nice (could be a bit louder tho), remember it happened quite a few times that you forgot to unmute your microphone after you came back, and talked for a while until you noticed no one heard you.
What I would like is being able to set a hotkey to turn it on/off because, when you play a game with VoIP with a friend and some publics, you will just want to mute teamspeak and talk ingame so everyone hears you.
And to not get annoyed by the warning, being able to toggle it on/off with a hotkey just like the microphone would be nice.