Unfortunately now new characters need to have an age defined or the game gives them 0's for every stat. Probably because CKII now identifies them incorrectly as newborns. With decisions you can add the 'age=random' line to circumvent this but for characters the AI spawns you cannot. Which quickly leads to a gameworld filled with characters with 0's all over.
EDIT: Ninja'ed.
EDIT: Ninja'ed.