ICON is missing the 6z run on pivotal, however, comparing to 0z, it looks to be leaving more energy behind out west, and the norther stream is "on top" of Southern Wave, vs phasing in the backside.
WAA snows are not the best ratio producers even into super cold air masses until the favored zones. Been here too long to rely on anything above 10 or 11-1. Best ratios as always are in a CCB or ULL pass. Stick with 10-1 and adjust higher if needed.