That would be an awesome idea, a whole campaign dedicated to taking over a fallen house, maybe after you complete it you can have the ketch as like your own clubhouse seperate from the tower, maybe hold clan or fireteam social meetups there. Could use it as a way to expand on destiny's malnourished storyline and learn more about the fallen and make them mean more to the story than just being aliens what needs some shootin. If they did a dlc that in depth id pay for it.