My first test game was run with the following changing in PB from the HIP release on the 17th of February:
- Reduced the size of Robert of Apulia's starting forces somewhat
- (No Ahistorical Empires) Fixed Adal and Maghreb being part of dejure empires in SWMH (Note: NAE was not active in this test)
- Battlefield duels now work properly again: reverted the integrated New Duel Engine to its previous version (pre-3.4.1 PB). Kept the new-style combat trait icons originally from AnaxXiphos
- Until the code can be analysed in-depth and cleared for take-off, "Hold a Grand Tournament" is now disabled (related to NDE revert) due primarily to potentially critical side effects with the do_not_disturb character flag
Independent realms:
For the most parts, borders were reasonable. France was an absolute mess, with English, Croatian, HRE, Lombardian, and Irish exclaves, and several independent French duchies.
This mess seems to've happened as a result of numerous marriages between French nobles and external realms. It is also worth noting that the Principality of Salerno is Pecheneg and Orthodox.
There were a few strange exclaves beyond that. The Lombardians have a small one on the Scottish coast, and the Italian duchy of Taranto has one in the middle of the Bulgarian Empire. The Fatimids also have some holdings on the Greek coast which I'm not entirely sure how they obtained. Part of this exclave split off as a Shia duchy of Epirus.
Russia is a bit of a mess as always, but beyond that most borders make quite a bit of sense.
Culture:
Culture spread was very reasonable for the most part.
English culture spread to part of Brittany and south-western France, but this makes sense as they held the areas for centuries.
A tiny bit of Lombard culture spread to Scotland, but the real issue there isn't culture spread, but that they got that territory to begin with.
In the HRE native cultures in the Low Lands, Bohemia, and Northern Italy got hurt badly. As a result I slowed down culture spread within the HRE 1/6th further after this test; they should not be able to displace cultures so easily.
They didn't manage to push out Wendish culture, but this was a result of a strong Wendland; they held the Wendish cultured area for much of the game, and still hold most of it in 1490. Note that Wendish culture is excepted from the general slowdown of spread of German culture in the HRE, so if conquered it should be mostly gone by the end of the game.
Religion:
The strangest part here is perhaps the Orthodoxy between the HRE and France. This seems to have been a result of marriages with Orthodox rulers leading to those rulers taking over.
Beyond that nothing truly outlandish. A few catholic heresies here and there, most notably Denmark and Sweden going completely Cathar.
The Baltic Pagans remained strong. Might have to do something in the future to discourage that.
The Slavic Pagans mostly died out; I believe Wendland converted to Catholicism peacefully in the last century or two of the campaign.
Poland also went entirely Orthodox. Not entirely sure how it happened, but it is entirely plausible so not really an issue.
Some pockets of Judaism here and there in the Middle East. Not quite sure how those happened. Isolated enough that it might've just been random chance though, so not necessarily an issue.
I did another test after this. I'll most likely post an analysis of that later today.