I agree in part, Willem, but the way we have done it is to allow the person who did the engraving to invite critique. This is done out of courtesy to him/her. I see the same things you see and praising bad work is not doing the person who did it any favors. There doesn't seem to be a perfect answer as to how honest forum critique should be handled.
I had a friend who was a gunsmith who gave me old parts to work on, such as barrels and cylinders and even a 1911 slide. They were good practice pieces because I was working on the real thing.
I guess the bottom line is pleasing our customers, never being content with the end result, and constantly striving for improvement.
... I'm still amazed at who is watching us. People you'd never, in a thousand years, expect to be looking at our work and taking mental "notes".
But I believe that experts forget what it was like to start. They say they remember but they are so far down the path of knowledge it is truly difficult to have a clear picture.