Hello everyone!
In case you haven't noticed yet, all registered users have access to view the post revision history (not just your own, but any post). You can see the link "view revisions" next to the information that the post was edited as shown below.
The revisions page shows how the title and the content of the post changed. The tag changes are NOT shown yet, but it's on our todo list. If an author of the post edits it within the 5 minutes of being posted, it will not be included in the edit history.
Please let us know if access to the revision history is easy enough. We hope that this feature will help all players improve their posts :)
As the next steps we also want to include the tag changes, allow to easily revert the change, and provide a page that shows all most recent edits.