I also miss information about user actions in many advisories. For example, when I have vulnerability in Apache, I just update the package (following the instructions from advisory), and Apache is restarted automatically. OK.
When I update browser, to get the problem fixed I should tell all the users to restart their browsers. Usually, this information is not present in the security alert from the distributor.
The things get worse when security problem is fixed in the library. I've got an update for libxml. I've installed the new package. What should I do next? After some thoughts, I guess I must restart all applications using libxml. How should I find these applications? Well, I can do it, but I think that it is useful to include into advisory something like: "After installing updated package, you should restart all applications using this library. For average user, restart of you Gnome/KDE session will be sufficient."