Not 100% historical, but since I played an 1345 Hungarian campaign, I noticed that all the feudal court buildings were missing for Hungary, I had to build ALL of them to make sure that the next ruler will be able to get the King-tier ancillary. I'd like to suggest that you script all the level 1 feudal buildings for Hungary and the Croatian settlements, the system of the ispán was well-established and functioning in the timeline of the late campaign