I’ve posted an updated version of Endymion at Endymion by Dercomai, which tries to remain as faithful as possible to the original version (meaning there are no fundamental changes to the puzzles) while addressing some of the main sticking points (unclear wording, bad synonyms, missing hint topics).
The original (release 1) and new (release 2) versions have also been uploaded to the Archive, and will show up on IFDB after being processed—meaning you can still play the original version if you want the authentic Iron ChIF experience.