I'll take
A greater expansion of customization within the class system, weapons, abilites, characters.
A party system would be great.
Vehicles could be a good addition but I don't want the multiplayer to loose the feel it had from KZ2.
Would like co-op with the cover system. I really like the cover system from the campaign and think it would be great tactically for co-op missions.
Was in the MAG beta and loved it. Then I started to see more about BFBC2. I delayed purchasing MAG to try the BFBC2 demo and realized I should have stuck with MAG. Just preferred the gameplay of MAG.