I suppose the real question is "How portable will the mission creator be?"
I should clarify this a bit more. Suppose that you have a group of people that wish to work together to create a single mission. Bob likes the do level design and layout, so he designs the maps. Jen likes to work on AI and handles the interactions and unique mechanics. Mike likes to do most of the storytelling, so he develops the dialogue and helps on character models. You have your own small development team all at hand, but none of them live anywhere near each other. Will the system be in place to allow them to work together on a single project.
I suppose from a programming side it comes down to will there be a single file somewhere on the directory that contains enough information that will allow us to pass that single file back and forth or is it spread out among 30 different directories that will leave us unable to work collectively on a project?
Supposing that fails, will there be a way to tag a mission as a work in project and pass ownership to another player (requiring permission of course) to allow them to work on the project if they download the full mission from the server rather than simply playing it directly from the server?