Hello, thank you so much for the comprehensive review. I'm really happy that the adventure makes you want to run it.
Yes, absolutely agree that the cryopod can be substituted with other thing, it can be a regular tomb as well just like you said, and I absolutely love that starting point that you are about to do. The mimic that reveals itself when saying "Hastur" is also wonderful. During the playtest, we playtest it using Daggerheart and using "Demon of Hubris" as an adversary when the saying the "Hastur" part.
Regarding turn against Hastur, we will take note on that as we might create the expanded edition of this adventure.
Once again, thank you so much for the comprehensive review!