@User
when we make a block reference, we are actually copying the content of the notes into the generated html. it wouldn't be too much of a leap to make the block into its own note with backlinks if people want the references to show up in the graph.
there are problems with that approach as you mentioned but they are workable issues.
when you say extended backlinks, could you describe a little more?
if i'm looking at
dendron.features
, should i see backlinks for
dendron.features.cool-feature
?