CAFE Standards to Improve 300C Aerodynamics

It looks like congress is going to raise the Corporate Average Fuel Economy (CAFE) standards to 35 mpg. In response auto makers are trying to come up with ways to attain it. At Edmunds.com it's reported that.

At Chrysler, insiders say the company is studying how best to redesign the big Chrysler 300 sedan, with one proposal said to involve a move away from the current upright, boxy silhouette to a sleeker, more aerodynamic profile in order to enhance fuel economy.

I think that changing the shape of the 300C for "aerodynamic" reasons of fuel economy is at the most,shall I say dubious. I mean unless one is traveling at high speeds, are the aerodymamics involved that subtle ? A better way to improve fuel economy would be for people to not floor the gas petal.

Things to come?