Navigation Notification Ding?
It's such a simple little thing, and would be almost effortless to implement, but I'd love a setting with navigation where the nav voice is muted, but when you're approaching the point of an instruction (a turning, exit, junction, roundabout, etc), just have a gentle "ding" sound. That way you don't have an irritating voice distracting you all the time, but you equally don't miss a turning after being on the motorway for hours. Would others find this useful?