That's not how my NU8000 works -- when I leave it on 16:9 STANDARD but leave Fit to Screen OFF, the picture is zoomed in on like there was overscan applied. When I leave it on 16:9 STANDARD but leave Fit to Screen ON, the image appears without any perceived "zooming."Screen Fit isn't for overscan, it's to give a 1:1 pixel mapping from source to display. Setting the TV to 16:9 will apply overscan.
It's a personal choice. I don't have any issues with the content I watch requiring overscan so, I can't really give an opinion. Likewise, it would depend on how badly I noticed the issues as to whether I'd want to use overscan or not.
Not much help I know.