Retinue system. If you don't have the DLC, you won't see the new interface and you cannot hire retinues (and neither will the AI.) The technology that controls the max size of your retinue and relative decrease of normal levy sizes simply does not have this effect without the DLC.

Orthodox Councillor models

Major Decisions for the Byzantine Empire

Byzantine Events

Faction system. Replaces many existing plots and normal revolt mechanics with factions.

Personal Improvement Ambitions

Orthodox Patriarch system

Have both a Plot and an Ambition at the same time

Revised levy raising. (You raise a single, large levy from each direct vassal. The opinions of vassals of vassals are irrelevant.)

Leader Focus on Combat

More Cultural Buildings

Improved AI

Bug fixes (of course)

It's Wednesday, and time to answer some questions about the upcoming DLC for Crusader Kings II;. The focus of this mini-expansion is going to be the Byzantine Empire and the Orthodox church. First off, in order to clear up any confusion from the original announcement, it's a bit smaller in scope thanso the price is set at. While I say it's smaller in scope, if you include all the stuff we're adding for free in the accompanying patch (v1.07) it's probably about the same size as SoI and v1.06.So, let's take a look at what's in the DLC and what's in patch 1.07...Oh, and we're taking another tack with the DLC this around - if you don't own the DLC, the AI won't be using the new mechanics or events either. Also, from now on in multiplayer mode, the host will control which DLCs are active.I will talk about all these features in detail in upcoming dev diaries, but for now, that's all!