Another question, will there be mechanics (maybe included in the government scripts) to make large empires unstable? Like for example, for AS, when the Basileus dies and the heir is not respected enough there being a chance that script induced unrest causes rebelions in some parts of the empire (as happened historicaly), or when playing as a celtic faction rivalries between tribes causing a split (part of the confederation going eleutheroi). Or maybe that kind of events reducing unit availability on recruitment pool for a while.
No, not in the first version.

Indeed it was originally planned to integrate an "Imperial Collapse"-scripts, but as many things in EB 2 it was never been finished.

In our first release we focus on:

-Units

More then 200 + (if time permits we will have even more) and unique horses attachments for every faction.

-Recruitment & Migration

We created a complex recruitment system based on colonies, polis, landownership, culture and native troops.

-Governments

We try to create an interesting gameplay experience based on scripted events to represent the expansion and control of foreign countries after you beat them at the battle field. Not all will have the same standart in our first version, some will have more complex events and building trees than other, but our goal is to make them all unique in the future.