That car looks fat. Hell, all mustangs this gen look fat. Overweight. Plump. Obese even.
Aerodynamic styling? Not on your life! Make it a brick on a brick, flatten the nose, and pump it up with flab. Hang some blingy faster and furiouser carbon splitter thingies under the bumper, never mind that it'll never actually go fast enough for those to do anything but add drag because the car is huge. Might as well trail a drag chute behind it all the time. Pretend that putting more horsepower in it makes it ok, but then sell the stock "GT" with barely enough horsepower to be able to watch a 10 year old f-body kick it's butt.
Some of the retro cars look ok because they're really trying to look like the old cars, but there is no reason for the mustang to look like a pinto caught with 2 sticks of butter crammed in it's mouth.
I'll take a GTR, any year, over the current (or last gen) mustang any day. The last mustang that looked cool was the 1993 and earlier model. After that, it just done growed up and got porky. That's ok for bubba and the trailer trash, but come on. Ditch the visual styling cues that make the car look a few hundred pounds obese and bring back something that looks FAST, not overweight and fast only when pumped full of cow steroids.