Problem: Vandals frequently continues their behavior after blocks expire. ClueBot will start at level-1 warnings for IP editors after a block expires. So, after blocking an IP, admins must keep a tab open to follow up on that editor's edits once a block expires to watch for continued vandalism. The longer the block is, the harder this becomes. Watching talk pages doesn't help, though that's a checkbox in Twinkle's block popup window.
Proposed solution: Provide admins with option to be alerted if an editor resumes editing within a select time period after a block expires.
Who would benefit: Admins
More comments: This would be immensely helpful for tracking LTA cases. To distinguish this from Community Tech/Add a user watchlist, I'd request that this only be done on IPs and only available to admins, which I think Twinkle could manage. An alternative idea would be a "review edits" page for admins that shows diffs like Review Changes log but for recently blocked IPs.