Now that I’ve seen the surface depiction, it seems like it might be having some feedback issues like the Canadian last night. You can see it trying to pop the low well east of the isobars it should be located at. Thus the paltry snow shield.
From the coastal, you’re right. But as the ULL digs down, it’ll be in a good position to put a deform band over western Nc. I have no doubt there’s a higher ceiling down east with bombogenesis but in most setups, this is a 4-7” invent under the ULL.
More or less, it’s just finally keying in on a closer to the coast track and a more expansive precip shield, which rakes the east coast. Not necessarily moving north - you can see the nice halt on the south end of the blue.