Why are alisaie and alphinaud in Dawntrail?

[Gember]

All I am getting from this thread is that the Trust system ruined the writing for the scions in Dawntrail.

You know, we had like random soldiers and scions with no names help us in the past regarding trusts. Why can't we have a little bit of side lore and help from a NPC from a village/town in Tural somewhere? That way the scions we all know and love doesn't have to be wedged into the story like this. People can see them again at a more proper time. We got all of those feather guys and gals just hanging out in Tuli; so why not bring one of them along for the ride? (Edit: We had a whole entire side story explaining the importance and power of the hanu hanu feathers that were placed on armor.)