As a quick editorial comment, I've been playing D&D for more than 20 years as an adult (with the same group) plus a few years in high school. I think the Dying Skyseer is one of the most interesting and well-done adventures I've ever seen or done. I wouldn't recommend it to new DMs or new players, but for anyone who already has some dungeon crawls under their belt and has mastered the basics, I think this adventure gives a masterclass on design and interesting intricate plots and investigation. I added a couple of small additional storylines to tap into or set up things from player backstories and also just to try to slow down a little to give time for Digging for Lies to come out on Roll20. This chapter was long and did have some frustrating moments for the players, but I think they were "good-frustrating" and will made their eventual triumph over the "Shadowman" and future rematch with the Steelshaper (who they just hated with a white-hot passion!) more rewarding.