I would like to request a seperate file (bgl) for the airport containing only:
By having a seperate file, it is easier for third parties to develop a tool like ADE or AFX like in the FSX days. And also it allows the community to update ADE files easily without asking a dev everytime.
It should also include Aprons.
I suppose an issue with going back to FSX editing is, runways and airport elements are no longer restricted to being flat, so, how do they deal with the z-data of all these elements, especially as you move the points around in 2D?
The airport xml file can be edited to create an airport file exactly as you describe. A project can have 2 airport xml files, one with the data you describe and another with the remaining data.