Thanks squishymaster - hehe, and if you are IT-competent enough to get Gorgon's Crown working nowadays, you certainly are competent enough to edit .txt files do do basic CK II modding - so you're welcome to join if you want to help expedite the process and get an early look at the build!
And also great stuff, Iron Gore! In order:
-Run any changes by me first, but no, we are not going "canon only"
We'll make changes where they make sense, or improve gameplay and/or immersion.
-Yes, the many of the Brecht states will be merchant republics. We may have to give some of the more powerful realm rulers titular king titles, however, so that they can have duke/republic level vassals under them, but this shouldn't be a problem.
-I think we can script some alliance-events for when the Gorgon expands, either east into Brechtur or west in Anuire so that the human rulers there support each other (which they would, surely). The Gorgon is extremely powerful, especially since he at present has 3 vassal-states under him; Markazor, Mur-Kilad, and Kiergaard. Avanil will be the de jure liege of Taeghas and Brosengae, and Boeruine will be the liege of Talinie - so they'll be quite powerful as well. However, when the gorgon attacks for example Mhoried, the Mhor should get an event that says "Ask for aid against the Gorgon", and a large part of Anuire should come to his help (50% chance for each ruler that gets the choice, perhaps). Same with Elinie, as they also share a border with the Gorgon.
-We can do the same for the Brecht when they are under attack from Rjurik or Vos raiders, or the Gorgon. "The free flow of trade is threatened, and war has come to Brechtur from foreign realms. Should you send out messengers asking for aid?".
As for:
We should take into considerations some of the game balance issues that always arose while playing and every region had theirs, most notably from Awnsheghlien that were too powerful verses their neighbors (Gorgon, White Witch, Raven, Magian and Serpent). The others were designed with behaviors not conductive to military expansion (Rhuobhe, Spider, Chimaera, Lamia, etc), yet how can we model these behaviors in CK II mechanics? If we don’t address this, then every game of our Mod will just end up with the “Battle of the Awnsheghlien”, player led or not.
Well if the Awnsheighleen use the religious duchy-level CB (which costs 500 piety/regency now), then neighboring realms do tend to come to their aid. I've seen the Gorgon attack Tuarhievel, for example, and the Sielwode and even Llubraight joined in with their defense! But it should also be possible, say, if one of the major awnsheighleen take 30-40% of a region, then the rest of the rulers there get an event that urges them to unite under a single banner. In my view, the starting date of 1524 is just when the fragmentation caused by the end of the Roele-Emperors is finally beginning to end, and it looks like Anuire at least is just about ready to proclaim a new Emperor once either Avanil or Boeruine settle the issue between them.
We can further mod casus belli's however to be different for each awnsheighleen, if needed, and also generally make tweaks to existing CBs to ensure that they have the "Birthright" feel to them.
Edit: As the Awnsheighleen are religious enemies, at least for Anuire, Holy Orders will also play a significant part in Anuire's defense. LDRevolution is working on implementing them now