What I can say atm is that cultic recruitment no longer works on a per-settlement basis, but it's a global on/off thing that applies to all the settlements of a faction, depending on the prominence of the Cult in it. You can think of it as a global reform, which can be switched on and off at will, though switching comes at a cost, both because it costs money and because your entire army can suddenly become unrecruitable/unretrainable the moment you switch from one type of recruitment to the other.
All that without having to be in possession of a specific settlement and without scripts of any kind.
More details might follow in a preview. DoM has so many new and unique features we could be previewing 'til next year.
