I just wanted to note that 2vs2 is not the limit. If you can get the coordination in the team right then 2vs3 or 3vs3 or NvsN are possible. Only thing that will happen if you add more people is that turn rate goes down. OTOH since it is not strictly necessary for everyone to give orders (another team member can always move for you) with more people its easier to fill gaps due to players not being available.