Maybe you missed the text in post 5 where it clearly states - "The next part of the layout is less 'finished', most of it has only recently been ballasted and 'grassed', so its rather too neat and tidy and lacking buildings, etc."?
I can't imagine there is much difference between what you expect to see and what the builder aims to achieve - perhaps (as has already been implied) he prefers to run a few trains before applying the final touches?
We all work in different ways!