Thanks for your post. I will be interested to see how it develops. Hopefully there will be some useful contributions.
I have recently started using Layout in preparing construction docs. Previously I used Sketchup and exported scenes to CAD. So I am in learning mode again.
About 70% of my projects are extensions and remodels. I do not generally document existing conditions other than give an overview eg the building / space. Maybe I should focus a bit more on this.
I find that the drawings that you posted contained good information and of a high standard. Were they prepared using Sketchup > Layout or did you use a CAD program?
How much work did you do in Layout if you used Sketchup > Layout.
Yesterday I bought the Sketchup To Layout 2015 training materials and have started to work through them. They seem to have some good tips so far.
Walter