Using map view, I find that the view into a container isn’t that useful in most cases. For one thing, it tends to spoil the symmetry with non-container notes in the same view. It just doesn’t look as clean. I’d like to have an option for a drill-down icon, rather than the miniature container contents view. There’s a Mac app called InShort that uses this convention quite effectively. My diagrams look clean, while packed with detail that can be drilled down into.
I assume one would select this option for an entire document/fiile, rather than note-by-note.