exactly what i tried to explain sesqui, but you said it in a better way:)
i'll add another example: multiplayer campaigns....
i was thinking on a way to make possible to have something like a "world online", limited to the campaign and the variables obviously, for example: imagine a team v team game, 5 sectors in a row (may be more, its just an example), the two extremities are the bases of the two teams, game starts in the 3th sector (the one in the middle), who win goes ahead in the direction of the opposite base(i don't know if it is possible to build loops in the missions list), each team start a mission with a standard amount of forces + the forces saved in the precedent mission, who destroy enemies base win. A lot of variants can be added, for example, the more you go in sectors near a base, the more the team the base belongs to will have advantages, mission may vary from sector to sector, from a simple melee (starting point) to more complex missions.
the game design will be like: who wins get +1 points, who loose get -1, the first who reach 3 wins, but presented in a more "involving" way
this could be a nice idea for a league, and it may make fs2's multiplayer grow a little (well i was thinking about this to build something to play inside my clan, but it isnt a bad idea to export i think)