Lots of really smart decisions with the visual design! The room borders describing light level is quite nice, and the color coding of glyphs, stones, and brands makes it much easier to parse the content.
I think it is a bold choice to direct the text to you/Ur/the GM (if I understood correctly), though the effect on my was mostly confusion and trying to figure out if the players are Ur, or what was going on.
One thing that I have to mention is that, while I enjoy how much you could fit in this module, at times I felt that there’s so much stuff that I had to keep going back and forth to confirm that I really understood what was going on.