The main mechanics change in this build is to Mana Nodes. They now have a cost to bind, which depends on the size of the node. The mana production numbers has also been rebalanced. It was very easy to amass crazy mana income without this, and starting close to large/massive mana nodes made an absurd difference.
Enrage Wildlife has been changed from a basically useless hex state modifier spell, so that it now creates a roaming unaligned army of terrain/climate-specific beasts. Beware that the beasts will also attack your own armies and holdings, so casting this close to home serves best as a training exercise for your armies.
Dungeon exploration will now result in progress towards clearing the dungeon. When this reaches 100%, there is no more loot to be had from exploring it. In a future patch, reaching 100% will allow sending a party to fight the dungeon boss, if any is present.
World generation has had a lot of tweaks. Primitive/barbarian/tribal culture naming has been greatly improved. The province where the player starts will now be less crowded, but will always have minimum 1 dungeon. The number of cultures and independent cities generated has been tweaked to scale better with world size and generation parameters.
Deity/cosmology generation has been improved. For example there are now usually a few lesser and/or demigods in the pantheon. Also, if a warrior or martial culture has been generated, a god of war will always exist.
The info window now shows expected income/expenditure of resources, and shows the top 3 resources apart from the basic gold/mana/influence. In a future patch the resources shown will be configurable from the economy window. This window (the crate icon) is also where you can currently always see the full overview of all resources.
Bug fixes: Zooming has been capped in both directions. Toggle favored follower works again. Fatigue/wound status text/icon has been cleaned up. Crash fixes. Rebels will now attack things again. Notification messages will no longer refuse to go away during the turn they appeared. Notification messages can be dismissed with right-click. Tooltips for notifications are much improved, and most messages can be read in their entirety from the tooltip, if desired. Arcane site income which was missing has been fixed. Generated content text capitalization, plural and spacing fixes.
I have also made good progress towards getting load/save of games functional again, which it hasn’t been for a very long time. This sub-system is being rewritten to be less of a pain to maintain going forward.