Ah, those are some good questions... perfect for the Extended Edition (TM).
To touch on the procedural elimination of certain powers: that's a deliberate design choice born from my 'Forever GM' experience. It happens to run the same adventure for different groups or with some players who've seen it before, but since I love being surprised as much as they do, swapping out the powers lets me keep everyone (including myself) on their toes with a fresh twist every time.
As for the scope... ooof, there’s so much things I wanted to write, but the page constraints hit hard (fitting 13 different things into a jam entry felt like a legendary feat itself). There are reasons why he’s confined in a valley, his half-lich, half-undead, half-something else nature is a small clue. Once I get the space to drop in a full area layout for the Extended Edition, I’ll definitely expand on it!
And, of course, thanks for the feedback.