I have some ideas... I'm a bit lazy to see which of these are already suggested
Native VOIP... let me chat with my team... or even help them out
Don't forget the mute!! I know this is coming
Friendlist... I've had this since Age of Empires... for the love of god
I think is is already planned... definitely needs to be in game (Impulse SUCKS)
Lobby Stats... So I don't have to alt tab and crash 5% of the time
Hold mouse over name in lobby to see important stats. Win/Loss total and most importantly DISCONNECTED GAME COUNT
Premade detection - I wouldn't mind going against a pair... but I would want to stick the new guy with them.
If 2 or more players play more then XX% of their games together (on the same team) they are highlighted in the same color. (could be XX% in the past YY days)
Another possibility
If 2 or more players played together (same team) in the past X games they are highlighted in the same
In lobby stat browser an alternative to hover over stats
I really need to know who I'm playing with... at least to make sure teams are fair