I started playing the single player game again at christmas.
The game is still unbelieveable.
Basically, there's not an immense amount wrong with Halo 1, we just want more, and more options.
When you're joining a game, you want to be able to see exactly what the rules and set up is without asking, disliking it, leaving, joining another game, asking etc.
You need to be able to send over your game setups to your mates.
You need to be able to play with no grenades.
I think that if you have 4 players and you play a 2/2 split formation, you should be able to close the voice channel to speak only to a particular person, but be able to open the channel to your team easily. That might be a bit much though, not many spare buttons eh?
Perhaps each team has a designated commander/Captain, and their voice has priority over anyone else speaking on the team.
Also, you definitely need to be able to scream at the other team when you kill them/win, even if its only at the end of a ctf game.
There should be so many ways of playing this game, and I hope they are realised.