I do not see what anyone gains from attacking someone's work like this. Most people will never notice these problems in motion, regardless of what this person claims. It is always hard to work from problematic source material, and Adywan himself freely admits that the color correction leaves artifacts. The result is certainly not perfect, but it much better than the original overall, and if people think they can do better, nothing is stopping them from trying.
I do think the AVCHD of ESB is better than ANH though, and the MKV is very good. I love watching it. A DVD-9 is usually too small for 1080p to look really good, and while the difference between the AVCHD and the MKV is not great, it is definitely there.