Well, the fact they're doing revisions means they care bout feedback from their customers and they wanna improve it. Isn't that good as a whole?
Remember they're a small startup that just showed up a few years ago with the LCD2 as their first real step into headphones (Note that the LCD3 does not seem to suffer the same revision problems). Not really fair if we have the same expectations for consistency and R&D on their products like the bigger companies such as Sennheiser, AKG, etc.
I for one, am glad they did revise it . Based on the frequency curve on my pair and what I'm hearing... I might have one of the newer "rev. 3" models. They definitely don't sound as dark as I would have thought. In fact, much more neutral than I expected based on many of the reviews out there. Will post a comparison with HD650 later in the HD650 Appreciation Thread.
Nope but there are problems in the past with "veiled" and "non veiled pairs".