This is quite along the lines of my earlier comment, which would have made Island Romance and Italo-Romance two different Living Languages, the former having specialties of Tuscan, Neapolitan, and Sicilian with the latter only having Sardinian. But maybe you're referring to Italy differently than I do, as all my research puts the North Italian languages about as far from the Italo-Romance languages as Sardinian. My simplification above would have Western Romance as a language with specialties including North Italian. The nice thing about this is that you cut down on the number of languages significantly while maintaining the overall relationships since you're just increasing the breadth of what one Ability handles.