Having one friend over for a part is boring. Having 3 friends over for a party is epic as hell. If you're going to have a multi-player campaign, actually make it multi-player. 4 players in the game max, not this tidily 1 v 1 you've passed off as "more then just a beta" since your failed MPC promises with ETW. If we can get 8 players into a normal online match, 4 in a campaign shouldn't be much harder. You already have all the frame-work for it. Really, the MPC of ETW is good minus a few issues (inability to observe battles as a spectator, lack of naval battle, it only having 2 players at a time) and I love that you can save/quit the game and the next day get everyone together to start where you left off. Just add the 2 additional slots (and ability to spectate) to the MPC and you'll have an amazing game.