On the last item, because people reach for it too readily: erase and set up as new, then restore only data, is not a thing the standard restore flow does. You get a full restore, which brings the same state back, or you get a genuinely new device where you sign in and re-download apps by hand and lose per-app settings.
That second one does fix index problems. It also costs an evening and every app login you have. Worth it for a device that is unusable. Absurd for missing shortcuts.