I have now noticed another nice feature. If I delete tracks from the top of the list (after they are played, for example), then a like number of additional tracks are added to the bottom of the list. And, when these tracks are added to the list, if additional tracks are needed to complete the work at the bottom of the list, then those tracks are added.
I am happily using the "new and improved" Auto DJ Works feature to randomly select and play music.
I have also discovered that, while Auto DJ is active, if I want to play a specific work that I have manually selected, I can do so simply by adding the work's tracks to the top of the play list, while remaining in the Auto DJ play mode. When finished with these hand-selected tracks, I simply delete them. The important thing to remember is to add the tracks to the top of the list so that the Auto DJ Works selection process is not disturbed.
I will report other observed results as they occur.
Art