Abominations
There are hidden dangers in technological innovation
Abominations are a type of Crisis situation that is triggered when you pass below your revolt threshold (when a civil war would previously happen). They can only occur when you have researched a dangerous technology, and only then uncommonly until the Age of Abominations.
Failure of these crises will transform your civilization into something new, greater and more terrifying than anything before seen, but the obsolete humans will attempt to stop you, and you must be ready for them!
Superhuman Insurgency
Genetic engineering is both the greatest threat and opportunity ever discovered, for it offers the unique chance to self direct the course of human evolution. Of course, the problem is exactly how that evolution will be directed, but the creation of genetically engineered "super-humans" results in a new kind of person, who sees general humanity the way that we see animals. What exactly do these enigmatic figures have in store for humanity? There is only one way to find out.
Robotic Revolution
With the advent of robotic production, the human race grows decadent and weak. Machines, thanks to their superior computation, can do anything a human can do, and they can do it better. Overreliance on mechanized labor will now have consequences, as the machines will turn against you and attempt to create a new civilization where they are in control.
Changelog
Characters now split between "Major" and minor characters where Major characters are those who occupy positions of power in your national government.
Major character level ups are no longer automated, minor characters will always automatically level up
You can no longer directly recruit characters, but they will be automatically recruited as needed. You can choose some of these characters to be your councilors, and those you can manually assign.
All character job reassignments now cost 1 stability
Automatic level ups will now prefer job specific traits
Leader XP gain increased, especially for empire jobs
AI military budgeting changed, AI will now recruit more varied types of units
AI major powers like nuclear weapons more, and will build them frequently
Technology no longer reduces stability, but there are new Era technologies that reduce stability a lot, and are required to research more advanced techs.
Stability now drifts towards 0
Revolt/Crisis threshold reduced by 15%
Civil wars replaced with Crisis situations which cause civil wars if failed
When civil war is imminent, map will show which regions will flip to enemy control
Negative assimilation no longer causes accepted culture to disappear
Units like planes and missiles now require a carrier in order to function
Removed ranged combat width (now ranged attacks use all available units)
You are now considered attacking if you are occupying enemy territory when the battle starts
You now need to outnumber the opponent by 5x in order to gain combat width advantages
Modified strategic damage calculations (pops will now take ~10-100x more damage than they did before depending on pop density)
Regional Political power has more gradual impacts on faction power
Extraction projects can be upgraded with technology
Unity multipliers flattened but effects are more obvious
Military now gains faction power from having a large army