This whole thread fascinates me, this is just the kind of stuff that attracted me to Joplin. In a way I was looking for an alternative to Scrivener, but it amounts to the same thing, organizing and cross-referencing ideas.
This isn't exactly what you're looking for, but if you select your five notes, for example, you can use the Combine Notes plugin to make a combined copy.
It's not a view mode, but it's pretty quick and uncomplicated.
The Convert Text to New Note plugin complements it, being able to send any selected section to a new note.
Scrivener by comparison lets you cut files in half. Useful, but not as flexible.