So I live just northwest of Richmond, Va but grew up in SJ and spent my first forty years of life there haha, so I give myself permission to weigh in.
IMHO I don’t think the 10:1 ratio maps will turn out to be accurate. It’s possible but I believe “total snow depth” consistently ends up being closer to the final outcome.
For instance where I live the 10:1 map showed 8” of snow. The snow depth map showed 3.5 to 4” especially the short term models late. We had moderate snow from 6am to 11am and hovered between 28° and 30° and indeed got about 4”. I think The Delaware Valley does great but those totals on the NAM 10:1 seem real overdone.