This is exactly why I think the weeklies should require people to finish the full operations. The Oricon story requires you to clear all the bosses, but most groups only care for the weekly. As a result, most people are no longer able to clear the story missions.
I say that or that there be an extra bonus for those who complete the entire operation. Like maybe an increase in comm limit for that week, or a special token for a new vendor. and perhaps unique items. I find it annoying that I still haven't completed DP, it seems everyone bails before the Council, or gives up at that fight. And then, as others have said, you can't get a group together. for that one last fight.