One problem with ministers is that you never know what your alternative options are until you fire one of them. You can always wait for them to quit, but I’d rather be able to pick from a variety of replacements over multiple turns. It seems especially critical to have an experienced Chancellor, and I’d rather not have to fire someone every couple of turns to find one who supports groups compatible with my current policies.
Some way to see who’s available before firing a minister would be very helpful. Maybe you could add a button or a tab on the Cabinet screen?