Radiance, first off, kudos on the work u put into this. Good stuff !
The biggest difference this winter compared to last I believe is going to be blocking. Enough of it and you can have cold cover much of the U.S., coast to coast, including the upper Southeast even with a -PNA. Ala., 1978-79. Of course on back, the '60's featured this fairly consistent. Blocking was so strong it congested the flow to create a +PNA at times with a -PDO background .
Of course, as so many make a point of, we are in a warmer Climate era now so, things are different now. Yes, this is true but, a watered down version to the pattern those years is still possible. Also, we are in a decent Solar Minimum now and let's not forget the descending QBO.