I believe that the recent embossed/exotic skin phantoms do not come with the Céline logo as it is with the Luggage, Cabas and other styles of bags and pouches.
I think it is not to distract from the natural beauty of the skin/embossed leather. The first few renditions of the embossed croc phantom had differing hardware and logo embossing details. Hope that helps. Though I may be wrong but this is my take on it.
For what it is worth, the bag's shape is enough of a signature style of Céline that the logo itself is really secondary.