I was fiddling around with some ideas for a while earlier when I got bored. After figuring out what I want to do it seems that it would only work well with our size requirements if it was designed for 4 people.
If I really tried to push it to 5 or 6 players I could, but the quality and balance would be diminished.
Anyway, we do have some maps that can't be played with more than 6 players. Would a map that can't be played with more than 4 be out of the question? I want to know what people think about the possibility of 4 player, or since it's almost related, 2 player duel maps.