Here's the use case:
- I really really like managing from the list view
- I'm working two closely related projects that I can't combine for internal reasons
- There are a lot of overlapping tasks
- I can link them but it doesn't help in the list view
I can relate tickets from the other projects to my Epic (parent). I can see it in the Epic itself.
Is there a way to include "adopted" children in the list view?
I suspect the answer is no but want to make sure before I add to the wish-list 
Cheers, Sean