Well at least they actively working on it .... this is from last four updates
Party Chat
Enhancements to improve 2-player party chat.
Audio quality improvements.
Chat connection status – New icons have been added to let you know the current status of a chat connection in your party. A Clock icon means the connection is being made. A Squawker Ring icon indicates the connection was successful and actively shows who is speaking. An X icon means that networking limitations (such as a Strict NAT) are preventing the chat connection from completing for specific users.
Improved connectivity between multiple users with Strict or Moderate NATs – We also made some improvements to party chat in partial mesh situations when multiple participants are behind moderate or strict NATs with their home gateways/routers.
Game and party invitations – Made improvements to game and party invitations to help you know more quickly who is inviting you to what without having to wait for the text to scroll on the game and party invite notifications.
Performance improvements – Decreased the time it takes to set up person-to-person (P2P) connectivity for party chat, and streamlined the retry logic for setting up party chat sessions.
Party Chat enhancements
3 new icons were added to Party Chat to show each user their own microphone status.
Kinect icon means the Kinect is being used as the microphone.
Headset icon indicates that the headset is being used as the microphone
3rd icon indicates that you do not currently have a working microphone, in that you are connected to the Party, but nobody can hear you.
Party chat improvements
The party app will help you get your microphone enabled and show you when privacy settings or networking issues are blocking communication with particular party members.
