A handy feature that I would love to see would be Category Cooldowns.
For example, let’s say a user breaks the specified format required for a category. Rather than just deleting the post, the user could receive a cooldown for the category they posted to, preventing them from posting topics and/or replies.
This would help out moderation significantly; users can still go about their day, but also receive a proper moderation to help keep forums clean.
See a related post on a separate Discourse Forum, if more of an example is needed.