Nope. That is a terrible idea. It’s a massive amount of work. All of the origin characters haven’t been added yet. There is a reason BioWare only did the origins thing once. It is not efficient design.
Well, see my above post why I don't think it's as massive as you make it out to be. But I think it's necessary for the story. As the story currently stands...why should I care about my PC on this nautiloid ship? I've not been given any time to develop who they are before being thrust into the insanity. Furthermore, why should I care about the pc I made when all this background and story exists for the companion NPCs.
Additionally, another way to do it that would be less time intensive, pull a Pathfinder Kingmaker and provide it via Text in likea storybook mode. Wouldn't be that difficult.