Can we create a [[:Special:RecentBlockExpiration]] page listing all the blocks that have recently expired? It would be useful to check back on problematic users, IPs and IP ranges, to see if their editing behavior is still disruptive. It would help to alert us when a long-term block expires. It would not be necessary to show blocks that were removed by administrator action. Each entry should include a link to the contributions of the user, IP or range.
Thinking some more about this, it makes sense to list previously blocked IPs, ranges and users only if they have resumed editing. If they have not resumed editing, they are not any kind of problem.