I recently had the fazor upgrade to my LCD3s. First off, they were a joy to work with giving the specialized customer service you expect from a boutique manufacturer of high end audio. I was thrilled they offered owner the fazor upgrade. I expect manufacturers to continue to work on improving their products, especially high end audio components. So, I resign myself to the fact that some new and better headphone may come along - if not from Audeze from someone else. Put me in the camp that understands that newer versions of the same model can be expected to have some changes over time, for better or worse. And also put me in the camp that is pleased with the fazor upgrade. In my system it did exactly what I had hoped - it provided a little more air and top end without losing any of the other qualities I like about these phones. To my ears, a little extra was added and nothing subtracted. But - this is always subjective.
Has anyone ever thought we all ought to have a chart for our hearing capacity so when we are reading the opinion of others, we will know if their hearing is significantly different from ours? This, to me, seems as much a variable in how someone evaluates a headphone as the gear in front of the headphone.