The purpose of this task is to enable within FlaggedRevs a way to defer for review edits identified as //suspicious// in some way, such as by being tagged. The defer can be either **passive**, in this case he version viewed by readers is still the latest revision but the page is listed at Special:ProblemChanges, or **active**, in this case readers view the latest revision prior to the user being deferred (the one a rollback would revert to). If the user is the sole editor of the page, then it is listed at Special:UnreviewedPages.
I've being working on an implementation of this concept in [[https://gerrit.wikimedia.org/r/#/c/218104/|commit 218104]].
The integration with AbuseFilter is T51770.
Documentation available at [[https://en.wikipedia.org/wiki/Wikipedia:Deferred_changes|Wikipedia:Deferred_changes]].