Similarly to Pebble I found this easy at first but very tough to finish off. Thanks for the challenge, Bungo, and for much entertaining misdirection...
I didn't find the endgame instructions particularly precise, but also not overly GWIT. I never really made sense of why the final word in the message was scrambled. Anyhow, some nice clues and a resilient puzzle. Thanks Bungo.
PS I never quite parsed 32d.