I can see a 'Reminder' nag box on first run of a new version of Calibre.
(the Nag does not try and determine What was different, only that there IS a local version of a updated mainstream file)
Local Overrides detected: <List>
Review suggested
The question is
effort.
1) Simple: Always list overrides at every install
The disadvantage is this soon becomes ignored (not read) like the EULA
2)Tracked: Only List outdated (since last report)
assumes the needed corrections will be applied before the next Calibre update
trickier to track if users skip updates