I've been watching their progress on it. It's one of many projects and they have limited staff. I think 1 person works on it part time. I think it will be some time yet before anything comes out.
it's based on the d6 system as has been stated, but more importantly focuses on the roleplaying challenges because Honorverse is not a conventional traveller setting IF you expect to be following in the footsteps of the stories.
As a setting it is very traveller friendly, but most people who know the books would want to play military based characters rather than a bunch of space drifters out for a buck which is what many space rpg campaigns have been in my experience. So the HH rpg focuses on trying to get characters to act the part of members of the millitary in a space setting, which many players will need help with.
many rpg players are shall we say less than disciplined when playing, and punching your superior (npc) officer in the face because you dont like what he just said to you is going to get you court martialled in any realistic millitary setting, so players need to learn a different style. The HH rpg aims to try and make this easier, and at the moment thats what they seem to be working on more than rule mechanics, with a bunch of playtest groups running and reporting game diaries to the devs.
It would work well as a traveller setting both for millitary and non millitary characters however. The careers from high guard nd mercenary are pretty much perfect for making HH millitary characters. Some setting specific alterations would need to be made and I suppose youd need slightly different careers for the Royal Manticoran Navy, the Peoples Republic of Haven Navy and the Andermani and various others but probably very minor ones. The ship combat works differently and would likely need redoing somewhat, but all in all I think traveller would adapt well to it.
In any case Ad Astra have the rights to it so I dont think making a traveller suplement would be possible until Ad Astra have released theirs, but I'm no lawyer
