Congratulations to you, Michael and Jeff for a really fine series. It is overall a superb production - very useful, relaxed, friendly style, good quality video, hits the important stuff plus some. The material covered is very well-explained.
One complementary piece that may be the subject of an essay on the website is a step-by-step walk-through of the workflow when one wants to ROUND TRIP between Lightroom and Photoshop for doing stuff in Photoshop that Lightroom doesn't do. Exporting to Photoshop is clear enough, but the process and implications for taking the same image back into Lightroom (especially if layered) could use a bit of elaboration.
One suggestion for the series as a whole - it would be helpful if someone had the time to produce an alphabetical index of sub-topics identified according to their minute-point location in each segment. For example if I wanted to review "Schewe's midtone contrast technique" I could look it up on a list and see I could find it at minute ** of Segment +.