Changelog:

History improvements:
-- Full playable era history for all of Zakhara except parts of the Crowded Sea
-- Cormyr map and history rework, including new province of High Horn
-- More of Laerakond is playable in early starts
-- Small history updates in Waterdeep and Najara
-- More progress on playable Laerakond 1357-85
-- Tethyr rework
-- Ama Basin rework
-- Three new mamluk societies
-- Other tweaks - Kormul, Dragonspear, some new courtiers
Culture improvements:
-- New Ogrima culture for ogres around Zakhara
-- New dragon cultures - Steel, Song and Brown dragons
-- New names for Abeiran characters
-- Some cultural place-names changed to historical ones
Decision improvements:
-- New decision for hidden dragons to reveal themselves
-- Notification when a hidden dragon or vampire appears
Religion improvements:
-- Major feature overhaul, focussed on giving features to previously bare-bones faiths. (Process is WIP, but many changes in this release.)
-- The arcane religious reform feature now also enables great universities and libraries
-- Tech boost for the Inventive faith
-- More society memberships are now taken into account when deciding on personal conversion
-- No more rumours of homosexuality (no-one cares)
CB improvements:
-- The Kraken Society can now launch a major invasion
-- Bahamutans can now go after Brown and Shadow dragons as well as conventional Chromatic ones
Map improvements:
-- Ama Basin recoloured for better contrast
-- 'Tabaxiland' continent now has its apparent canon name of Arandron
-- Even unfinished islands in the Crowded Sea now have proper cultures
Ritual improvements:
-- Greater Restoration now cures possession
Portrait improvements:
-- Oni now have better outfits
-- Zakharan women will only wear the veil if they are Moralist or Pantheist
Optimisation:
-- Elective succession further optimised
-- Real-world references in trait localisation have been changed
Misc:
-- Many minor event tweaks, including more diverse great invasions
-- Rebalance for Tanarukks
-- New flags
Bug fixing:
-- Lycanthropes get correctly name-checked when exposed
-- Unsuitable Furious rulers no longer get given huge armies by event spam
-- Decisions to grant commander traits now work correctly
-- Halfling and gnome mixed-race children now occur in the correct proportions
-- The Arch-Geomancer is correctly able to seize the crown
-- An annoying interaction between dummy wars for raiding and the Jade Throne of Shou Lung has been suppressed
-- Cultural bars to adoption are now much clearer