Some quick answers for your questions
1. What I intended by "A tragedy witnessed through Unconfirmed Contact Reports" was to tell the silhouette of a story of the Watchtower's societal death through peeks. The way I interpreted UCRs was similar to capturing a blurry photo of aliens/cryptids/what have you, and enough of them put in the right order with a little context framing would tell enough of a story to use in other campaigns or modules.
2. The Cassette Cache puzzles are intended to be common geocaching puzzles, like physical puzzles to assemble and solve. In use/play, the cassette caches are meant to be looks inside the greater culture of the station through mixtapes and/or playlists assembled by any person on the station.
3. The Astronav Cartography Feed is a space version of The Weather Channel and an airport's departures/arrivals list. Reports are aggregated, and the feed shows stuff like likelihood of meteor showers, solar storms, and occasionally, patterns of issues with incoming ships. If you want to signal an imminent threat or have subtle signs that something is amiss, you can use the ACF to bring it to a common point.
4. The Fort Lot is more like an empty lot with supplies kids take there to make forts and such. It's less a play place and more an empty slot for a store occupied and repurposed by children.
I greatly appreciate your comments and critique, as this is the first time I've tried something this experimental, I'll keep them in mind moving forward!