So, I've been thinking more about this. I'm in no way a professional RPG writer, and it's been about 7 years since I had an active HARP group, SF or Fantasy, so I'm not really up to date nor fluent in HARP-speak anymore.
I've been look around and thinking about how I could contribute, but also what I would like as supplements. One thing really comes to mind: thematic books. These would not be catch all books, more or less complete with everything species, weapons, starship or gear... but rather aimed at types of games like exploration, military (can easily be at least three books: (space) navy, army and covert ops/intelligence), smuggling, bounty hunting, treasure hunting, etc.
They should include gear, equipment, talents and more fitting for that type of game. Design suggestions for characters, profession combos, present and exemplify the Tintamar species in these various themes. I think a central important fact is that the books should be tied to Tintamar, but of course not exclusively, but when it comes to examples at the very least.
I want books similar to Martial Law I guess, but with specific information about types of games, rather than whole new systems and rules for extra stuff. I mean, sure add in new stuff, but make it relevant to a small adventure (which I think should be included in these books too) and a bunch of adventure seeds.
I know this is partly what ICE/GCP has been doing, but at the same time the products are sometimes "too complete". I think a living, vibrant game is in need of a setting (or settings) that is a like a lymphatic system in all its products. Instead of a source book on Earth-space and one on the Nexus sector, why not make books on aspects of this, like: Earth: the navy, Earth: clandestine dealings, Earth: corporate espionage, Belter league: the smuggling ring, Tintamar: survival outside the law; Tintamar: sentient prey, hunting for cash... Nexus: meeting new allies, Nexus: new black markets ... and so on... thoughts? am I getting my idea across? These books would naturally sometimes overlap, but is that necessarily a bad thing?