Simon, thanks for publishing my variation! It’s very cool to see it on here. I came across this page while searching for Strega cocktails and thought “oh that sounds good” not realizing at first that it was my recipe!
Hmm, I just remade it and I thought the flavors of each ingredient were quite balanced. If anything, I get more Strega than banana. Did you use Banane du Bresil? I can imagine an artificial banana liqueur being overpowering.