Implied nude was removed from the list of levels some time ago due to the confusion it was causing. Nude is nude and topless is topless - simples [most of the time]. Implied nude has no commonly accepted definition and is open to wide interpretation. I'd be surprised if PS management consider adding it back for even a nanosecond.
The contradictory and misleading term Implied Nude was indeed removed a few years ago
as it was found impossible to achieve concensus as to what the term actually means.
There is little chance of it being reintroduced.