I would love to see new campains from BI. While we have a few community built campains, east wind series is much better in terms of story telling. I don't mind buying a campaign as separate DLC so guys who prefer multi-pay can opt out.
Unfortunately, multi-play precludes people who can't allocate large chunk of time like myself. In fact, I bought Sniper DLC and felt a bit stupid. Those new weapons aren't retro-actively included in East Wind, so all I get is showcase.
Building another campaign and feedback from the experience will improve the editor, so multi-play guys will also benefit.