Would be cool if we could add a command to make pre-written taunts, just like Quake or UT. My second "wish" would be to implement lobbys so we can join up with friends before entering a server which would let us stay together and not get "Congratulations, we have transferred you away from the winning team and/or friends". Instead of creating a Matchmaking system, only allow the lobbys to join servers with the capacity for all players.
I remember when I used to play stronghold crusader... "SLUBBERDEGOLIAN!" "SLUBBERDEGOLIAN!" "SLUBBERDEGOLIAN!" "SLUBBERDEGOLIAN!" "WEASEL!"