My concerns are more about the HS harvesting/correlation capabilities these relays have, than de-anonymisation of users.
I am not a Tor specialist, but would like to know if there are any kind of safety measures against such persons/entities employing automated big farms, high speed, stable guards, HSDir, without family set, or proposals being discussed on the topic.
https://trac.torproject.org/projects/tor/ticket/24526