After playing recently I started wondering what the breakdown is of card abilities in each half-deck. I quickly went through my set and these are the numbers I came up with (in case it is of value to others).
If a card had more than one thing I counted it in each category - for example the drow card that gives you two influence or allows you to promote a card I counted in both the influence category and the promote category.
Finally if there are no cards having a certain ability I left it out of the list (ie: only the Demon faction currently gives insane outcast cards)
One interesting note is that there are the same number of 'place a spy' cards in each half-deck. That means you always know that no matter what decks you use 1/4 of the cards (20 out of 80) will allow for placement of a spy. Also I put a star next to each category with the highest number.