For those not aware, you can get the latest version at
https://github.com/JonStryker/Witcher (link is also provided on the front page, it just redirects to that one).
Not much is happening with development at the moment as far as I'm aware, the Slack has been mostly quiet. Stuff I've been wanting to do has been waiting on team validation for a while before I commit to anything (map and title changes primarily). As for the team, I'm pretty sure everyone has just been busy. Personally I'm in the middle of finals so I'd expect similarly for some others.
Jade Dragon hasn't been great for development since it basically throws this big mechanic at the mod that doesn't really have a viable use in-game. I don't actually own the DLC, and no one has seemed very passionate about the mechanics and what they can do for Witcher Kings--specifically, the main mechanic, the Chinese Empire, just doesn't have an amazing use, and not much more out of the DLC offers much at all. The biggest thing in development lately has been the new bookmark, which is almost done as far as I'm aware, and the team has been discussing a bit about societies and which ones would fit, but I never had the time to code societies and I'm not sure how far anyone else has gotten.
All I can really say at the moment is to be patient with the team, updates will come when they can. There isn't any major directions the team collectively wants to go, so suggestions for potential new features, changes, etc. would be appreciated, at least by me. I can speak for at least my self when I say I don't have a massive drive to do work for the mod currently because there aren't many things I realize the mod needs, despite the mod definitely needing some more meat, and it's been like that for a very long time.