Amazing adventure. Good suggestion for introducing characters and for dealing with the denouement as well. Even though the game I run (The Expanse) doesn't support psychic entities (or kinda, if I consider something related to the Protomolecule), I'd like to adapt it into a campaign someday.
Edit: I'd like to recommend making a printer-friendly version too by removing the images and making the background white. You never know when someone might want to print it.