Re: Not just faces
Except that most of the things you mention are routinely done for film and television productions and can be done by anyone with a copy of After Effects and a few hours to spare to learn the necessary skills.
The real benefit of this particular software is that, at a stroke, it has rendered revenge porn almost completely ineffectual. (Granted, it won't make the abuse of trust any easier to deal with, but the power of revenge porn is the social shame and with plausible deniability on their side victims will much less to deal with.)
(Apologies to those who make the same point further down.)