Martin published new pictures on Facebook and said few words about the current development. He works on the game everyday but there needs to be done some engine tuning because of the transition to Unity 5. The other important aspect in progression is the ratio between playability and performance. How many trees should be there? How dense? What about other objects? What is the limitation of player's hardware? What should be the FPS? And more and more must be decided. That's why Martin is not updating so often until these decisions are made.
But we can tell you that there are many other details in the development. We have seen pictures of equipment, amours and few more secret things and we must say that you will be more than pleased. Trust us.