Exclusive assets IMHO doesn't make sense, but it depends of author's will when and if he want to release it. Especialy, when this three ships I mentioned before are incomplete and require more work.
And another reason for keeping ED files unreleased is status of the whole mod. ED was never dead. It's waiting in queue, as the mod is 90% done and it's a waste of cool materials and storyline for just a random mod dump as I mentioned in November Status Update. As soon as Mystery Project is complete and released, we want... Or wanted to finish ED. My disapperance about a half of a year ago due to real life issues delayed the process... But only DELAYED not STOPPED.
Shiv left me non-official leadership, and I had plans to lead this to the end. It was the only way to publish all the stuff with original team members will... And sorry, but I don't know if it's still a freakin point in finishing ED right now.