If I may , I understand everything you posted and totally agree, however, given the look of the pattern previously, combined with the weeks and weeks of -AO, -NAO and West based Greenland blocking one would have thought the area North of Dover Delaware and into the Wilmington corridor should have seen a lot more snow to date.
I understand climo exists for a reason.
As you mentioned our climo is lower due to elevation, ocean NE wind influence ( more so earlier in the season ) and I would even include our latitude as well.
Miller Bs for sure are way more erratic in snowfall distribution. Even in the 2016 Blizzard where Bob got 30 inches our forecast bust here because the best dynamics were West of the Bay.
So many variables.
Hopefully the upcoming pattern eventually produces a storm where the coastal plain can benefit.
Seems for my area, and maybe @CAPE's as well, a Nino might be more effective because we lock in CAD and then get vigorous over-running.