A player mute function. Battlefield Bad Company forgot to add one of those, so many times I had to team kill squad mates to make them leave server so I didn't have to listen to there music playing or pre-puberty voices. (PS3 has a voice changer so there is no excuse).
Anyway, real unique player names, I don't wanna run around playing with 8374-8375-4848 and 3741-8390-9821, or even various Johns and Janes. Be nice to get to know individual players over many games without needed add people to friends lists.
So far they have said 16 players, Wii Speak, DM, TDM, CTF + more. That makes me happy enough,