I also think Marionette is awesome and enforces modularity. The author mentions, "View A handling events from View B and vice-versa" which makes me think that

I also think Marionette is awesome and enforces modularity. The author mentions, "View A handling events from View B and vice-versa" which makes me think that he's may not be following the adage of "signal up/invoke down"; He may be just wiring up listeners in an adhoc manner and not establishing clear ancestor/child relationships with his views.