Make Special:Recentchangeslinked display changes to transcluded pages (templatelinks table) and embedded images (imagelinks table). This should help a bit against the recent spate of template vandalism on enwiki.
Also make the "Show changes to pages linked" button work for categories.
Remaining issues / things to do:
- Test performance of the UNION query on a larger dataset than my test wiki.
- Add some checkboxes to allow filtering the results like on Special:Whatlinkshere.
- Try to think of some way to make the behavior for categories less klugy.