G'day Jan,
Excellent news.
Multiplayer is great but it typically applies to only a small, but vocal, percentage of the total player pool. The majority are after quality single player experiences.
Given this could I make a humble suggestion that you include the ability to 'randomise' the position, and perhaps course, of units? Even a simple sub vs. ASW Frigate mission could be a lot of fun if you don't know where the sub is.
If you have to design a mission and don't have the ability to 'randomise' the whereabouts of the sub then your single player experience is null and void as you'll always know where the sub is 'cause you put it there.
Not needed if you are only aiming the editor at Multiplayer but an important feature if you are planning on encompassing singleplayer.
Cheers,
Lancer