I can see the value in this.....in cases where a face has been grossly disfigured. ...due to accident etc. In some ways this has been done for some time now.....but not with the name "face transplant" . Burn victims have had major corrective face surgery. The difference might be the addition of bone structure /or replacing bone structure to redefine the features.
(and aside........being the spy novel enthusiast I am......I think that spys go through "face transplants" to conceal their identity .......when they come out of the "job".
or maybe that is just the fantasy I impose on it...
Either way......it IS intriguing.