I would agree with the other comments that the image looks too washed out and flat. The beauty high key that you are talking about (bright, even light but maintaining the contours of the face) is not that easy to attain as it seems. Still, you did a great job considering this was your first glamour shot.
The "clamshell" suggestion (I didn't know that light scheme had this name) is a good start, you can also use three softboxes in front of the model, one larger one on the center and two smaller ones tilted inside a bit, something like this \__/ I guess this would be the "inverted clamshell"?
If you shot RAW, you can probably go back and reprocess the photo and tone down a bit on the highlights and recover the detail there.
Thanks for all the comments guys, its interesting to hear most think its too bright. I did shoot in RAW and the original settings are not as bright, but I actually prefer this look and won't change it.
Although I am a huge fan of blown out beauty shots in black and white, I am not in color. This technique will be a cure for smooth skin without retouching and filtering in post. Too many like to follow rules and will not allow the creative process of blown out skin. In beauty work, skin is sometimes blown out for effect. Don't let someone detour you from creating images that don't follow portrait or PPA rules. That's not to discount the opinions of those who don't like it, as they could be your potential clients.
I think in a presentation it needs to balance the model on the right side with negative space leading into her will yield better results to the eye.
However, If the client is happy, no need to seek opinions from us. ;-)
