The image is definitely soft and there are distractions in the photo that take away from what should be the main focus of the image, the model's face. When working with models you should always focus on their eyes.
Can you give us more information on what equipment you are using (camera and lens) and the settings for this image. Also were you shooting in JPEG or RAW?
A lot of times a soft image can be punched up in PhotoShop using the UnSharp Mask tool.
Here is an example of a photo I took that pretty much adheres to the "rules" for good portraiture. Enjoy