Yeah, I haven't seen the tree yet in person, but it didn't look terrible to me from the photos. I know in this area the Colorado Spruce don't do that well in general. This tree is up on a property at the top of a hill. They are growing this and a few others as a windscreen and are hoping that they don't have to prune the lower branches off. I don't know how many bagworms they have pulled off, but I wouldn't think it was a huge contributing factor to the dieback. It has been a couple of very moist years...I'm not seeing enough of the symptoms. I don't grasp the gravity of the situation. That sounds mean, but I don't intend that. In a managed landscape, pruning the lower bole makes sense. The foliar necrosis? I'm not noticing it enough to respond in depth.