That's a good idea. An ingame feature called 'monarch approval rating' that members of a kingdom would apply towards their leader.
It'd at least be a cool statistic to pop on the website
Also, I disagree with using a bug to remove a kingdom leader. There are obviously other ways to do this, and by resorting to a bug to remove kingdom leaders it's showing impatience and ineffectiveness to create a resolution for the issue.
We can take this bug, and compare it to assassination in a way. By using it, you are taking the leader out in a sense, so it is fitting. Now, by assassinating someone who still has approval over some of their members, you only succeed in making this person a martyr. By convincing a majority of your colleagues against this person, there's quite possibly a way to use force to convince change or force them to step down. Of course, there are those who are too stubborn to realize when they're no longer favored, but I'm sure there's the staff to help out in those situations. Or at least other kingdoms which would become involved at some point as well.
I think from this point on, this bug should be viewed as a bannable offense. A retroactive position on this isn't needed, but if so chosen I wouldn't be against it either.
I agree, this bug needs to be fixed as soon as possible. It's starting to become a big issue, so it'd be great if a resolution for it became a priority. This would be a positive response from the staff for it's supportive customers.