That is false, the zerolink protocol implies that the coordinator is blind and the coordinator has never been blind, first because of privacy leaks at the network level as I demonstrated a few months ago in the bad implementation of Tor circuits, and now as nothingmuch has demonstrated with the signature problem affecting both Whirpool and Wasabi.

You can look up all the discussions on the subject I've had with the Samourai boys, it's always been stupid to use centralized coordinators because it means “trust”.