I'm glad to see that there is still interest in this game and this project after a year away from it.
Here's where things stood about 18 months ago before work largely stalled out with Xcalibre moving on and my being deployed:
1. The last official project which had been completed was the substantial reworking of the Orks. They work very well now, are a blast to play, and are far fluffier than ever before. This was the last thing Xcalibre produced as far as I am aware.
2. After that we were debating whether to move on to Tyranids (my recommendation) or Dark Eldar (what we went with). Discussions had begun regarding a revamp of the Dark Eldar to make them more fun to use and play without their original "the game is over in 5 minutes" concept. We had refined a number of weapon rules and had worked out the concepts for what we were going to do with them largely, really the big issues was figuring out how to better portray their ambush/stealth concept. Then the project stalled and nothing was actually finalized.
3. Tyranids had some discussion, but things essentially stalled over what to do with some of their unique weapons. I'd gladly revive those conversations, as this was a case of their rules being often slightly too simple to actually work well, or having unnecessary complexity in other ways. As I said we had started talking about it but stalled out. Overall their current rules are functional, they just have some relatively minor issues that could really benefit from a refinement pass.
4. The absolute last thing to be produced was my revised Campaign rules. These include the new detachment system, adapted from 8th edition 40k, which rewards balanced list builds while not disallowing unbalanced ones for those factions that can make them (cough, space marines, cough). It also converts the campaign system from the original book, which was NEVER A FINISHED PRODUCT MIND YOU, into a functional system. Flavor is added, complexity is decreased where appropriate, and quite vitally all factions now actually work using the same campaign system.
So where does that leave us now? I'm not the only one still here, I saw Horizon is still around which is good, and I actually only joined the project in 2016, but if we have the goal of releasing a unified new edition book all we really need is updated scenario rules. I talked with Xcalibre back at the beginning of 2017 and he mentioned that he had been working on them, but he didn't feel the product was at the point yet where he wanted to share it. I never saw a demo, but as he was working on that aspect of the rules I tackled the campaign and detachment rules (which took a good 6 months to finish).
After that we would need to just make a combined product and then we would have a unified edition update. Afterwards the factions which still need revisions are:
1. Dark Eldar - They desperately need to be reworked, and I'm curious to see what was down with them in the new RTS.
2. Tyranids - They are functional, but have a lot of issues that were discussed a while ago in this thread. Essentially they need the same treatment we gave Orks.
That's it I think. Rogue Traders could use a pass, but they work as is. Inquisition could also use a pass as they are stuck in 2004, and the concepts of how the ordos work have been very much refined and expanded over the last few years.
So here is my recommendation of how to move forwards with the core rulebook to have a new edition that we can present to the community (1 book, 1 pdf for all your needs, with everything working). The vast majority of it is already finished, what we need to add are:
1. Detachments
2. Scenarios
3. Campaign Rules
4. Maybe subplots
The Detachment and Campaign Rules are ready to go and just need to be incorporated into the existing PDF (I of course would appreciate proof reads and I'm open to balancing). I believe that the best way to approach this would be to make the Detachment rules their own section and place them just before the Scenario rules, and to keep the campaign rules at the end of the book. The reason I think this makes sense is both because the detachment system fixes a lot of the balancing issues we otherwise were stuck with while NOT requiring players use our updated fleet lists. It also provides us a cool mechanic for designing the scenarios.
With the detachments before the scenarios we then would be able to incorporate scenario specific stratagems and detachments, which would help to simplify the alternative force organizations appropriate for each scenario. So, for example, in the convoy scenario we could incorporate a new detachment called a "convoy detachment" made up of 3 freighter-analogue ships. Rather than have the player calculate points for freighters simply state that they must include 1 convoy detachment for every 2 detachments in the list, and I would recommend making this detachment cost 1 command point (-1 CP). This would encourage the defending player to take larger detachments (ie: Fleet Support, Recon, and Combat Patrol) as escorts to reduce the number of freighters they have to guard. For scenario specific stratagems for example we could make one for the escalating engagement scenario that would allow players to bring their units into the fight faster, potentially with the downside of needing a turn to shift power away from their engines (essentially arriving on All Ahead Full!).
Once we have the scenarios reworked we add them after the detachments/stratagems rules. Then at the back of the book we add the revised campaign rules and we'd have a completed product.
As far as subplots go I feel that they always were rather clunky and that most of their value would be represented within the stratagem system. That said we could largely leave them as is for flavor as an optional rule like they are now, or theoretically integrate them with the stratagem rules to provide a number of additional stratagems that players could elect to take before the battle that have some impact on their fleet or for the coming battle. I'm leery of doing that as it sounds like it would get very complicated very quickly, but it is something we could investigate.
Now with all that said, we do need to gain access to the templates needed to make the book into a finished product. Does anyone have access to that stuff aside from Xcalibre? If not is anyone in touch with him?
We're very nearly ready to produce a unified new edition book, we just need to start assigning tasks and get back to work on it. Hopefully we can get this all done in the first half of 2019 and give a nice give to the community.