I definitely would also like to see a more fleshed-out version, I kind of let time run out on this and tied up my early notes into a minimum viable product the night before the due date (just like college!)
My ideal would be to include a map of the island and like, calendar of events, and maybe a D10 table of B Plot seeds, and one of locals to run into. You've got a good point about the true truths, I might add to the list and make that a random table as well.
My idea with the Anchor board was to allow a player to signal that they were uncomfortable with the intensity of a scene without breaking the flow of the story. It's that moment in TV where the spookiness vanishes when another person walks into the room, things keep happening, but the threat can be ignored for the moment. The Meta is close in function to the X card, but is couched in the tropes of the setting still.