Honestly I think in terms of "Story" content issue is kinda silly since he's pretty much forgetting that Adventurers have the ability of the Echo so in a sense one could see the journey the the eyes of another and if people have noticed when in an echo you pretty much have the ability to interact with those around you and they react to you as a person, so I don't see why they wouldn't just be able to have it where the Echo allows one to see the plot through a different discipline.