I have a 148 directional Nug from last year as well. I ride that board more than all my other boards combined. Sure it can beat you up a bit when the snow gets chopped up, but I ride it on pow days, ice days, bluebird slush days.
Sometimes I bring one of my real pow boards with me to the hill, and will ride that once there are some tracks, but usually start out in the fresh on the Nug.
Try weighting your front foot more, it helps a lot with edge hold on the icier days.
I quite like the Nug, so much so that my second most ridden board is the Harvest (camber Nug). Amazing technology.