I wouldn't be surprised if it's been suggested before, but I really like the idea of self-contained scripted stories being available for ED, that would take place independent of the persistent online world. (In solo, or potentially group for co-op.) They're already ingame microscopically, for example Assassinate Pirate Lord missions, and I would definitely put down money for longer campaign versions. For some kinds of stories it would be better for the player to have set starting equipment, which I'm sure could be worked out mechanically and expositionally.