Some new things, mostly related to prisoners. Armies can now raid settlements and haul away prisoners to your fortresses or settlements (there is a “Prisoners” button where you manage army prisoners and transfer them) where they can toil away as slaves. A new Dark Sacrifice spell has been added where you can gain mana by sacrificing prisoners.
A spell causing sickness and disease in a settlement has also been added, and regiments of lumbering Mudmen have been added.
The first iteration of Dungeon generation is implemented. A theme is picked for each dungeon, and it is filled with encounters fitting this theme. They are also of differing difficulty, and give rewards and experience when defeated by a hero.
Sites also have a collection of stored resources now. This is only used by mines at the moment, where ore will be stockpiled. But this system will also be used to track food and various trade goods.