Increase the weight of moderation action.
- One spam or offensive flag counts for three
- One vote to close counts for three
- One vote to delete counts for two
- One upvote on a tag synonym counts for two (downvotes excluded because this immediately deletes the suggestion)
Remove restrictions on moderation rate-limiting.
- Remove a quantity-based flag limit, and introduce an hourly flag limit of, say, 20.
- Same as above for close votes, but instead set the limit higher on Stack Overflow.
For spam/offensive, these things aren't hard to tell, and this just saves time. For close votes, one 30k user and two <30k users, or two 30k users seems balanced. For deletion - deletion of content that should be deleted can take a while, and this expedites it. Same thing with tag synonyms.
w.r.t. restriction removal: 30k users who may be hitting the close limit on some sites could do better if they just came back to it in an hour and looked at some more questions. A rolling rate-limit seems effective.