Due to the sheer magnitude of changes from previous versions this will be far from a complete changelog, but rather a brief summary of the major changes in this expansion:

-Complete overhaul and expansion of the map with several thousand new provinces, and dozens of new tags
-Innumerable history tweaks
-Several new cultures and religions
-More fleshed out bookmarks
-Many more new decisions
-Several new trade goods
-Completely redone development values for 1054 (dev for more dates forthcoming)
-Reworked trade node map - more nodes across the board
-Area and region map completely reworked
-New Crusade mechanic
-New Ostsiedlung mechanic (partly tied to Crusades)
-New Norman Invasion of Ireland event chain
-New Plague event chain
-Many more events affecting prices of trade goods
-More Women in History events
-More events for different religions, governments etc.
-Dozens more new flavour events and event chains
-Major balance and quality of life changes across the board
-Reworked Kingdom of the Franks into Kievan Rus
-8 new disasters
-Several new unique government reforms
-9 new Imperial Incidents (Emperor)
-Reworked HRE reform order
-New estates such as the Mamluks
-Over 80 new unique mission trees for tags across the map
-Over 75 new National Idea sets
-Several new mercenary companies
-Hundreds more Dynamic Province Names
-3 new buildings (early versions of tax, government and production)
-9 new loading screens
-More Colonial Regions
-Various GFX tweaks and additions

-Hotfixed error that was causing random crashes and a few bits of bad code

-Fixed some UI issues
-Fixed major bug where all triggers around native governments were broken
-Fixed miscellaneous other bugs
-Rebalanced Apulia's starting position

-Fixed some minor bugs where area/region triggers used vanilla code and were thus broken
-Fixed a major bug where the Holy Orders estate was stuck at very high influence
-Added proper GFX for Holy Orders loyalty modifiers

-Fixed a major bug where hovering over the Industrialism spawn year text would cause CTD
-Fixed a major bug where Abbacy and Free City NIs were being applied to wrong countries
-Fixed a GFX error where the Low Crown Land alert had the wrong icon
-Changed Çerkezköy to its medieval Greek and Turkish names instead of modern ones

Updated the mod to Vanilla 1.30

(For EU4 version 1.29.6)

#Bugfix
-(Almost) Fixed a major bug where Balkan countries were jumping 10+ tech levels ahead
-Fixed miscellaneous minor bugs, typos, etc.
-Fixed the reskinned Mandate modifier still showing a dragon

#History
-Piedmont now starts much bigger, fixing erroneous 1054 Aleramici lands
-A handful of erstwhile Italian theocracies have been changed to local counties
-Sweden now starts as a Norse country, but the AI will eventually switch to Catholicism
-Strathclyde holds more of Cumberland in 1054
-Added historical Norse-Gaels in Cumberland
-Greatly improved David of Scotland's stats
-Friesland and Brunswick start with two Brunoning brothers rather than in a PU under one
-Transylvania now starts as a monarchy with the Arpad dynasty
-Moravia starts as a vassal (representing the Duchy of Brno) rather than a PU junior
-Tlemcen starts Sunni rather than Ibadi (previously there was confusion with Ifranid Tlemcen)
-Savigliano and Albenga no longer in 1054, but Piombino (representing C. of Suvereto) is now in
-Changed Sweden's ruler history slightly as well

#General
-The AI Electors should be less likely to vote for powerless OPMs now

Hotfix:
-fixed bug where nobody could fabricate claims
-upped province cap on tribal humiliation CB to 10
-added remastered gfx for the new pagan religions