So, in the past when doing this and you weren't able to take all of Ashikaga lands in one war, Ashikaga became independent and was usually immediately guaranteed, tribbed or allied by Ming, making it near impossible (arguable?) to finish uniting Japan... has this been changed? I would think they should be force vassalized as a daimyo, albeit a little pissy about losing the title of Shogun... or maybe instead they are just left alone by everyone so they can be cleaned up.