Good point ..I imagine that is part of the fantasy. If he came back from the dead and said, forget it sisters, I did all of those awful things - who knows if maybe some of them would fall "out of love" with him.. I mean, confirmation of the crooked back did seem to throw Philippa.
Perhaps you missed the show - it was proved beyond a shadow of a doubt that Richard had nothing to do with the deaths of the little Princes. As the reconstruction of his face showed, he did not have the face of a tyrant
. Case closed.