Agreed! Big spruce is a pain to split. We also have ash beetle, and lots of ash are standing dead trees. The ash seem to be better trees to css than the spruce. They are just more dangerous to fell when they`ve been dead for a few years.
For sure you always have to be extremely careful when cutting dead trees. Believe it or not, most of our ash have been dead for 10 years or more and only one has been a problem. Nothing serious and we got it okay but it was one that made us stop and think a bit before starting the saw.