Don't think I'll get this game or an XB1 anytime soon, but since when did more players = better online? Gears of War 1 has 4v4 and is superior to basically every MP game out there. Small amounts of players on focused maps = great game. Too many players on small map = bad game. As long as the map sizes aren't ridiculousy large, I don't see a problem with 6v6. It is funny seeing people's reactions though, the must only play Battlefield.
It reminds me of the people who think that 'open world game >>> linear game'. They can both exist, as not everyone wants a whole horde of kids running around a playground when they can have a more focused and team oriented game.