We could start a list of examples, to help show editors what all is possible, and useful, with the new filter combinations.
E.g. I was looking at Enwiki's Special:Tags and noticed the #possible vandalism tag. By itself it was not useful, because almost all the edits had already been reverted. But in combination with the filter for Latest revision it reduced the list down to a dozen or so diffs which I could easily go through.
That example isn't great, because even on the largest wikipedia it barely has any results, but it got me thinking that we should have a list of "examples of how editors/patrollers are actually using these filters".
I was thinking of https://wikitech.wikimedia.org/wiki/Help:MySQL_queries#Example_queries as inspiration (the page that Quarry links to for examples), where editors can add their own examples, and improve/organize them over time.
Similarly the drop-down list of Examples in https://query.wikidata.org/ which are taken from https://www.wikidata.org/wiki/Wikidata:SPARQL_query_service/queries/examples