I finished the Trilogy yesterday. I must say this is one of the best mapsets I've played in years. I didn't know that Heretic and Hexen could be blended this well together to create something so atmospheric. In some maps, like Willowwood, Vulture's Point or Cloister of Venom, I almost felt as if I played Hexen for the first time again.
I found as good as no bugs, except for one spot in episode 3's secret level, where I got stuck between the chapel wall and a bush and had to noclip myself out.
Some puzzles I couldn't for the life of me solve without looking them up on the net, such as the one with the wolf/griffin/dragon combination, or the one about weighing the phoenix rod ammo against each other. But other than that, a brilliantly designed mapset for Heretic and Hexen, that probably won't be surpassed in quality anytime soon. Thank you for this one, @Jimmy!
ps: I loved it when late in the game I happened to find a heartgem of Korax! I usually suck at finding secrets but this one got me on a hunt to collect them all and figure out their purpose. Sadly I had already placed the regular gems in their sockets by the time I found the Korax ones, so he didn't spawn for me. Was fun nevertheless!
ps2: The D'Sparil robe confused me as well. I actually mistook it for a dead enemy and let it lying on the floor to begin with... :-P