I think you’re definitely right @freisatz about integrating it with the current interface so it feels seamless and helpful – rather than just adding it in.
One thought we’ve previously had was to add a list of all the child cards of a card underneath a card in preview, almost like backlinks, so it would be super easy to get to and always be helpful. We could also repurpose the “backlinks” draw to be related cards that has backlinks at the top and all the children underneath. Some food for thought, if any of these ideas feel right to you for your workflow do let us know 