In being a long time halo fan there needs to be the re-addition of these two components.
First, the ability to changes options for arena where you can select the kind of players you prefer to play with. Example: competitive vs casual, chatty vs no mic and so forth.
Second, the return of the player list in the arena search and loading screen. So many times there is somebody on a mic doing something stupid (background noise, yelling/making nonsense noises, playing music) and we should be able to see exactly who it is immediately. This way we can mute them and potential report them as well.
That being said… I’m not inclined to believe reporting someone really does anything.