Just some quick observations: I know I’ll catch a lot of weenie tags for this, but the 12z euro looks like an analog of the 1991 perfect storm, in terms of the major players (NOT impact). Many similarities, including the Halloween blizzard that buried the upper Midwest at the same time. There’s obviously some key differences as well —nothing (yet) has this system deepening anywhere close to the 970’s. The absorption of hurricane Grace helped to make that storm quite unique...*If* anything remarkable can happen with this it will have be through some combination of absorption of tropical disturbances west of Bermuda and deepening as a sub tropical cyclone in and around the Gulf Stream.
The GFS is still largely a non-event so confidence in anything impactful is still low...
https://www.weather.gov/dlh/1991halloweenblizzard