The 2010 regulations aren't different than 2011 as it relates to the frontal portion of the car.
A lower nose cannot achieve the same quality of flow to the central part of the car.
The proximity of the parts of the underside of the driver's legs and the nose to the splitter and bargeboads has a direct relation to the quality of flow.
The mandatory weight distribution is not directly related to the nose and underside. It's only indirectly related by virtue of the driver placement.
The design goals in 2011 and the last 2 years are the same.
A cfd demonstration of the nose proximity to the central part of the car and how it affects the downforce would be good.