Lighting Director Question

You are to supervise the lighting of a face cream commercial. The script calls for an ECU of the model’s face. The novice LD suggests using a fast falloff “to accentuate the nice bone structure of the model’s face” Do you agree with the LD? If so, why? If not why? I do not agree with the novice lighting director, because fast falloff lighting means the subject is much darker, and it will not reveal the so called "bone structure" they mentioned. Fast falloff, upon first look, makes the image harder to see since not all of it is in the light. A better technique would be to use slow falloff because it enlightens the subject much more and the audience is able to view the smaller details shown in the face and body.