Really interesting! I came to it through my love for Riesling. So I doubled its part. I used 2cl Riesling and 4cl Bacardi. It's a little bit of with the acidity, but with this name this shouldn't be the problem! A dry and balanced cocktail.
Interesting twist on the Spritz. I like the fusion of a orangy cherry sweet. I this case i would go for the sweetness and reduce the triple sec to 2cl. My new name for the cocktail "Dr Pepper Spritz".