I want to return to the topic of religion and in particular to Christianity at 769.
In Carantania, after the death of Hotimir, the catholic slavic duke, local residents rebelled against Christianity and German influence, but in 772 the Christian religion was finally established. Thus, Carantania became one of the first Christian Slavic state. So, it is not quite clear in 769 to make the whole of Carantania, which is under the rule of Bavaria, the full Catholic territory. It's better to make Catholic the center of the province in case of the mechanics of the game and the remaining regions to be slavic pagan.
It is not entirely correct to divide Christianity of that time into Catholicism and Orthodoxy, although, as it is not paradoxical, the first and second types of Christianity are derived from Greek words. If you take the classic mechanics of the game, then the Roman pope of that time is an autocephalous pentarh, which has large territorial possessions, unlike the pentarch of Constantinople. In turn, in Byzantium (Eastern Rome) the heresy of Christianity , so-called Iconoclasm, is raging, which was supported by more of the political reasons - to improve relations with Muslims. It was a much more serious situation than the Council in Trulo. Unwilling to be subject of Eastern Rome, with its policy of Caesarepopism, the pope has the opportunity, during the heresy of the Greeks, to strengthen his independence, to find support in Western Europe. As we know, the ideal candidate was Charlemagne, who was crowned as the emperor just to protect the Roman patriarch from possible influence. Accordingly, if we take the probable events that a strong leader does not appear in the West who can create a new empire, and Byzantium has time to get rid of iconoclasm and begins a new Restoration of the empire, the separation of the two churches with mutual anathemas, which firstly occurred from 863 to 867 - could not happen.
In conclusion, it seems better to me to make Chalcedonian church, which is similar in mechanics to standard Orthodoxy. However, if an empire is created in the west, and the patriarch of Rome approves it, gets new proviences - and this event starts a chain of events that lead to a complete separation into two churches by the middle of the 9th century. Why precisely such a flaccid separation? For example, Cyril and Methodius prosecutors of Slavic tribes who translated Saint works into Slavic and made the adoption of Slavic languages for Cyrillic had the support of both the Pope and the Patriarch of Constantinople.