Changelog:

Gorak Tul bloodline is back.
Characters with Draenei culture convert to Eredun culture once they become demons.
Troll provinces in the Hinterlands don't have castles and cities except Jintha'alor.
Fixed an issue where a Horde vassal got negative opinion of the Horde leader when she/he (Horde vassal) gives her/his titles away.
Fixed an issue where WCDAC.5029 (an event that picks a replacement for Cho'gall) could choose a player in Kalimdor.
Fixed an issue where the Mind Control event chain didn't stop on your target's death.
Fixed an issue where the Disembowel necromancer's decision could raise suspicions if you were in the Alchemists' Union society.

Scripting changelog (ignore if you can't read CK2 script):

The Old nickname is back.
is_70_physical_age_trigger, is_80_physical_age_trigger, is_90_physical_age_trigger work with immortal rulers.

A few commands for testing:

event WCCRS.130 to spawn Gorak Tul.
event WCFEL.9950 to spam Fel Corruption and become a demon.
event WCDAC.5029 to pick the player as the leader of the Twilight's Hammer. You should have the Shath'gral religion and the Opening of the Dark Portal should be your bookmark.
religion old_gods_worship to pick the Shath'gral religion.
add_trait class_necromancer_10 to become a necromancer.
event WCCLS.5 to restore mana.