Campaign mechanics - Diplomacy:
- Factions now hate you for making them your vassal (i.e. after they accept your offer, the diplomat/princess will always trigger the unhappy speech).
While this in itself is no big deal or could be seen as realistic, the following is not:
After they are your vassals, if you approach them for any diplomacy, they will be as "welcome ally" stance. But once you ask for anything or even try to gift them something, they will always only barely accept and be annoyed after the transaction, as if they don't want to deal with you. What's worse, I tried gifting my new vassal 2000 florins and it was barely accepted, they were annoyed afterwards and my relations went from so-so down to abysmal....