A pretty interesting cocktail - upon tasting, I couldn't shake that this is a mezcal Last Word/Closing Argument without the citrus, leaning towards the profile of an Old Fashioned-style of drink. I'd fully expect that as a template, you can experiment with just about any amaro out there to substitute the Lucano to create vastly different drinks. I also do agree that 1 dash of any bitters probably helps this cocktail out a lot if a more delicate amaro is chosen.
On a second round, I attempted the recipe with Amaro Nonino to replace the same amount of Lucano, and added a single dash of chocolate bitters as Paul Green below had suggested - quite enjoyable!