Okay, I'll undress you CK2-obsessed can't-hack-it-in-a-different-environment morons so that you feel as if I'm not just sarcastically dismissing your loud cries for the ambivalent noise it is.
Overlords do not press claims on behalf of vassals or lower partners in unions for separate but discernible reasons.
The overlord-vassal relationship is one in which the overlord ropes off a set of territory for someone to, essentially, hold for him, be it enforced in a treaty or creating it in peacetime. Making the vassal larger does not benefit the overlord directly, so it is not an automatic function to press the claims of the vassal. Any casus belli the vassal owns belongs to the vassal, and not the overlord -- the biggest problem is that even a strong, stable vassal doesn't tend to handle its own business. That is what should be addressed, not opening up the casus belli Rolodex for overlords.
In the separate personal union situation, all of the focus in the relationship is about attempting to integrate. Making the junior partner stronger would only encourage it to continue to exist separately, defeating the ultimate goal of personal unions. This is why the overlord does not take over their junior partner's casus belli or get another means to grab these issues.
Oh yeah, and there's that other thing -- CK2 is their best? Really? You're trying to compare apples to bananas to oranges to watermelons. Every paradox game runs off entirely different constructs. Deal with it.
Overlords do not press claims on behalf of vassals or lower partners in unions for separate but discernible reasons.
The overlord-vassal relationship is one in which the overlord ropes off a set of territory for someone to, essentially, hold for him, be it enforced in a treaty or creating it in peacetime. Making the vassal larger does not benefit the overlord directly, so it is not an automatic function to press the claims of the vassal. Any casus belli the vassal owns belongs to the vassal, and not the overlord -- the biggest problem is that even a strong, stable vassal doesn't tend to handle its own business. That is what should be addressed, not opening up the casus belli Rolodex for overlords.
In the separate personal union situation, all of the focus in the relationship is about attempting to integrate. Making the junior partner stronger would only encourage it to continue to exist separately, defeating the ultimate goal of personal unions. This is why the overlord does not take over their junior partner's casus belli or get another means to grab these issues.
Oh yeah, and there's that other thing -- CK2 is their best? Really? You're trying to compare apples to bananas to oranges to watermelons. Every paradox game runs off entirely different constructs. Deal with it.