My WAG is ENSO neutral winters in general don't feature a predictable influence on the Pac side so the pattern is less predictable than in a Nina or Nino, and other factors tend to dictate the general pattern. I'm guessing if there isnt a favorable AO/NAO, winters tend to be milder overall and more variable wrt snowfall, and there is increased chances of little to no snow. I think I recall PSU saying Enso Neutral brings an increased chance of a persistent SER.