I'm posting a dev diary written by u/ACommonGuerrillo over at the r/Imperium_Universalis subreddit, credit goes to him

https://preview.redd.it/1hbsgdfmmqq61.jpg?width=500&format=pjpg&auto=webp&s=4175a22fd4b10cdd17980610ef6ed152755d7969

Hello everyone!

Today I will present to you the first dev diary for Imperium Universalis version 3.0 also called Sons of the Aegean and as the name might suggest this new update will be heavily concentrated on Greece; adding new mechanics there, new tags, provinces, country ideas, mission trees and more. However today I will give some demonstrations on a few new mechanics I've being working on and also some of the changes for the Anatolia region which as a peripheral part of the Hellenic world will also got some love with 3.0.

First of all it's the map and with 3.0 Anatolia has got a massive overhaul with the addition of new 147 provinces scattered across new areas and regions thus the development or pops of the region have increased as to represent on how on the Ancient Age Anatolia, could be the home to a Super Power and how it was very populated. To showcase the increase in province density, Lydia, has almost doubled it's provinces from 11 in 2.4.1 to a total of 20 with 3.0, other countries have similarly see a large increase in their prov density.

New Anatolian Regional Configuration

The changes to the province and map also come with changes to the history of the region in the start date, first of all Cimmeria will be buff now possessing over 120 total development and having as a tributary the minor of Lycaonia which is now independent from Lydia. Bythinia is now also an independent tribal Kingdom in the northwest of Anatolia and on the former territory of Heraclea Pontica the new tag of Mariandynia has being added ( a rather obscure tribe of unclear origin) and in between Cilicia and Lycaonia a new releasable tag has being added with it's own culture; Isauria.

New political and historical configuration for Anatolia

Isaurian flag, country color and ideas

Coming with new countries there also comes new government reforms to Anatolian countries: the Anatolian Tribal Federation, a reform exclusive to tribal countries with Anatolian culture that will give you military bonus, and the Lydian Kingdom reform exclusive to Lydia which will represent Lydia's economical power and Luxury.

Anatolian Tribal Federation modifiers

Lydian Kingdom Modifiers

Lastly for Anatolia there's the Chalybes who have received a new major decision for a formable. The Chalybes have received more land and dev also and historically were also known as the Anatolian Chaldeans living in the region known as Chaldia or the Pontus Cappadocicus, the reason they are special is because they are suspected to be the direct ethnic and linguistic descendants of the Hittites that survived on what used to be northern Hatti and for this reason they now can reform the Hittite Kingdom (though this decision will be exclusive to the Age of Empires age).

Decision to reform the Hittites

Which new capital will you choose?

Hittite flag, country color and national ideas

Moving on to other map changes other historically important regions that were densely populated in antiquity have also got new provinces and more dev, these are Phoenicia which is now it's own region with a total of 20 provinces and 158 dev and Israel and Judah who now combined also have 20 provinces and 113 total dev.

Phoenician Nightmare

Solomon's Kingdom

Now on the part of new mechanics there's a new cb that's going to be added; the Overthrow casus belli, the Overthrow cb will replace the normal Independence cb in the case that you are more stable and prestigious than your current Overlord therefore giving you the justification to topple them over and take their empire. This cb will be available to ALL subjects with THE exception of Minor Kingdom subjects.

Overthrow your Overlord and take over it's Empire

I've also introduced a new diplomatic action for either tribals or natives to help on their efforts to reform and civilised, this new action it's called "Civilisation Efforts", the requirements and AI acceptance will depend on your relationship with target AI with you being able to force this action in non-tribal or horde subjects or doing it diplomatically with your allies.

New diplomatic action

For tribes this diplomatic action will give you a modifier of 100% reform progress growth for 15 years and for hordes a -50% discount on Tribal Advancements equally for 15 years.

To end this post there's also an important to change to religion as due to the nature of religion or it's place in society during this era (low focus on proselytism) religious tolerance modifiers will be changed and also the incredibly large Pagan religious group has being broken down in smaller groups for the sake of more modding flexibility and as of now I've divided this new pagan religious groups either in a common origin, similar traditions or gods or simply geographical proximity.

Members for the Afro-Asiatic religious group

Thanks for your support and have a good day or night whenever you are.