@purduewx80made a quick mention a day or so ago. But yes, it is definitely something that will factor in.
Lack of discussion likely revolves around the big synoptic potential being more of the eye candy.
Regarding the north shift with the 12z RGEM... The overrunning event was well north, and the main storm system was also north, not surprisingly given the snowfall map.
The UKMET actually had a few good performances last winter, as did the Canadian duo.
The UKMET has been horrendous this winter though. Unsure if they performed any 'upgrades' or not.