I can have very much fun on my own messing around in the editor. Trying things out, wrecking cars, shooting weapons, destroying buildings and so on. It would be huge if BI is able to add a feature to the editor with which you can invite people (e.g. your Steam friends) or give them your IP address, so they can join your editing mission.
As Arma is not only a milsim but also a huge sandbox, it would add a lot of hours of fun to the game.
PS: I know that BI is currently working on more important issues
PPS: Maybe BI can think of adding this feature in a future DLC when enough people show their interest?
Thanks for the great alpha!