I’m skeptical of the forecasts for higher snowfall amounts. The ECMWF was overly bullish 10 days ago. With a sub 28” low east of Newfoundland a more amplified trough in the baroclinic zone is going to need everything in place.
In addition, there is a lot of Arctic, dry air to overcome. Without a well amplified trough closer to the coast I’m thinking the widespread 12”+ aren’t going to verify.