Many of the arguments against the Anglican Ordinal apply to the Novus Ordo, something that even Michael Davies commented upon in The Rite of Melchizedek though he inexplicably rejects the implications.
As for the Old Catholics, I have been led to believe that they had also changed their ordinal somewhat and their orders may already be patently invalid, though I don't have specific knowledge of the issue; but, I agree that the acceptance of priestesses, by its very nature, means that the understanding of the true priesthood is corrupted and requires one to presume that priests ordained by a bishop who has such a theology is not validly ordained.