Definitely coop through the whole story. Also, please allow same group coop. There was none of that in Arma 2 OA. 2 players had different roles. Also, Itoo would like to play all all side instead of just blufor. And just a strange suggestion cause I believe it has never been done before to my knowledge. Allow different players to not only play coop, but say two people are playing campaign, have them be able to play campaign on different sides. Another words, two players playing the story head to head. The outcome will change depending on player skill and attitude as well. Food for thought!