It also strikes me as problematic. As I understand it, in the other offences that have been repealed and have the expungement mechanism, all instances of the offence could be expunged.
You're essentially proposing that we look back to past convictions for being in a bawdy house or running a bawdy house, and you'd have to decide which ones were bad, inappropriate, Victorian or homophobic policing, versus the ones that were permissible. I think it would actually be complicated on the implementation side, because it would not be a category of convictions. You'd have to look at the details of each one.