The obvious next question, is how exactly. I assume it should work something like if title is ERE then vassal limit equals to certain number (since vassal_limit = X actually adds up X to the other modifiers)You can add vassal limit to the succession law only used by the ERE. Paradox did the same for the HRE's special succession law.
Another question, is it possible to add demesne bonus for diplomacy, just as one exists for stewardship?
Just adding "NDefines.NDiplomacy.DEMESNE_MAX_SIZE_DIPLOMACY_MULT = X"to defines does not work, I assume I have to create a modifier somewhere first. but I have no idea where it is defined for stewardship for a start?