In the links panel, opt-click on the update button updates all changed links. It also has a tool tip for doing so. I have been told opt-click is a 'standard' in many Adobe apps. But "update all cross references" is not so easily found. It requires to make sure no cross reference is selected and then click the update button. This is not intuitive and hard to find. Change to opt-click (with tooltip). Check for any other place that an update button exist and unify the UI in the same manner.