When one creates a redirect without filling an edit summary, MediaWiki automatically uses an edit summary to identify that the edit created a redirect. That's very useful. But the autosummary doesn't work if the user fills the edit summary. It also doesn't work when the user edits a redirected page to make it a normal page, by removing the #REDIRECT syntax.
Redirections are very special edits that would be good to have them tagged for review on recent changes and watchlists.
With AbuseFilter one could write some tricky filters to tag those edits, but that's far from ideal.
My proposal is to have at least 2 new tags:
* One to tag when a redirect is created
* One when a redirect is removed (not by page deletion, but by removing the #REDIRECT)
It would be nice to also have a tag for when a redirect target is changed (pointing the redirect to another article) and also when a redirect is edited without changing the redirect (like for example adding a category, a comment, or simply content that won't be viewed anyway).
A slight limitation of tags (as I understand) is that they won't display the redirect target as the autosummary does, but that's not important, I think. The autosummary would do the job when present.