Just started a new game of Venice on Ironman and noticed a change not in the patch notes. Previously I have gone to war with the Ottomans to get rid of my vassals on Naxos and Corfu. Went to war opened up the peacedeal after a month and ditching them was not on offer. So its no longer a sneaky way to free some diplo slots anymore. I am sure if they get sieged down it would be on the list but you can't just dump them as an exploit anymore. Probably a fair change, but thought I would pass on the observation.