Star Alliance and SkyTeam had poor connections out of Naples towards North America last season, so several of my clients overnight'ed in Frankfurt, Zurich or Munich to avoid having to leave Amalfi very early the in the AM or an overnight in Naples. A few that did, stayed at either Romeo or Parkers.
FWIW seems a bit better now. We're flying United from Naples → Zurich → San Francisco in September, all mid-morning and afternoon flights. So there seems to be better inventory now. Still not huge but a healthy amount of flights.