How are you representing the date? I could send you the character history files we have but they will probably need to be adjusted. (We just added a round 2500 onto the NE year so we could potentially in the future have a bookmark anywhere from the breaking onwards without the date being negative.)
I think that system will work. The bigger idea is to be able to play at any start post breaking.
An update:
I am working on a mini White Tower mod (to be integrated into this one). I had quite a lot of fun playing an enatic open elective government. CK2 lends itself to Ajah politics so had fun creating those events as well.
My main update is about the religion. Now, religion is not portrayed in a clear cut fashion in the books. By and large, the faith is based on Creationism - the idea that the world came into being because of an external agent - the Creator. So, obviously high_god_name is GOD_CREATOR. Correspondingly, evil_god_names is a nice list { DARK_ONE SIGHTBLINDER FATHER_OF_STORMS etc }.
But is it an organized religion? No. Does it have heresies? After a fashion. Is there representation of the clergy? No. Have there been instances of theocratic governments in the books? No. Are children taught any religious-moral lessons? Yes.
Light Group:
Fatalist
This is by far the most prevalent attitude: the Wheel weaves as the Wheel wills. Much of the 'wetlands' are fatalists, believing in a divine will beyond human comprehension. They do not have a religious head and seem to be fairly feminist.
Imperial Cult
In the lands of the Seanchan, the Crystal Throne and its occupant are the first divinity. The Emperor of Seanchan is their religious head, the notion of the Emperor is their high god. Being faithful to the Emperor is being pious.
Warrior Cult
In the borderlands, the Creator takes second place to Peace - that ephemeral thing all men seek. Here, to be pious is to fight the dark hordes. They do not have any religious head.
Ji'e'toh
In the Three fold land, it's all about balance between pride and humility. You gain ji by being great, you lose toh by being humble. Toh is a personal debt owed to others, while great ji is the mark of a great ruler.
Way of the Leaf
The Way is the pacifist heresy of Ji'e'toh. They are wandering nomads forever searching for an illusory eden.
Dragonsworn
Born out of fear and desperation, the Dragonsworn is a heresy of the fatalist view on life. The Dragonsworn are usually found in war torn regions, and they believe in the coming of the Dragon Reborn. They will band together every time someone proclaims himself as the Dragon, who is also their religious head.
(For the moment, I am not counting the Sea Folk and the Sharans.)
Dark Group:
Nihilist
The minions of the Dark One and his trusted followers believe only in Him. He is their high_god and his Naeblis is their religious head. They believe that the Wheel can be made anew by breaking it all. Only from the ashes of destruction can the new order form.
I would like your ideas on how to deal with clergy and temple holdings in-game.