Eh.....having issued 12 winter seasonal efforts now, I think they still have plenty of utility as long as you make an effort to incorporate climate change into the work. For instance, it's important to understand that what other forces are now competing with ENSO, and the ramifications said forces have on the hemispheric pattern. If you simply interpret a lower RONI as a weaker El Nino and blindly forecast colder because of that....yea, good luck.