I do not agree with the lighting director. Granted it is a face cream commercial, but it still is not a good idea to do that kind of lighting. The idea of making the subject, in this care a woman's face, the "center of attention" is an idea that only looks good on paper. If this "fast fall off" concept is used then it will not work for the commercial.
Yes models are pretty and that have great features about them, but it will look far too tacky. The contrast between the bright sides and dark sides are going to clash when it comes to a human being. With objects (the non-living kind), it is easier to use such a technique because it will never move and cause a shadow to appear that should not be there. Plus, most do not have oils or pours like skin does.
Here are two Examples:
Awesome!
Not-So-Awesome!
There is a very good chance this product does not even work well. What happens when such a technique ends up showing how well this product does not work? Then there are new problems.
My advice is to try something else!