Corvette C7 Stingray hatchback design-form without function taking 5 mph off the top speed?

The design guidelines for designing rear glass area of a car and scientific principals necessitating them are not all that complicated, with keeping turbulence at bay over the high pressure area as much as possible. 

Apparently +Tadge Juechter and his team of geniuses collecting questionably deserved paychecks from +General Motors   felt otherwise.

Discarding previous styling cues while following fashion trends is one thing but... without accounting for reality, the results can be of a very dubious nature.

The case in point, the hatch design of the newest Corvette.  Apparently good ole Tadge decided to make a fashion statement?  while discarding teachings of Bernoulli.  Granted, the wrap around style of the previous generations of the Corvette was getting dated and it did add weight to the car due to the size of the rear glass.   However, the design at least tried to follow the sound design guidelines, staying close to 15 degree slope angle and providing a smooth expanse of glass supporting laminar flow-good thing when high top speed is one of the objectives of car design (providing better fuel economy ironically enough as well).

The result was pretty obvious, with Corvette C6, 190 mph top speed for LS3, 197 mph for LS7  and 205 mph for LS9 equipped coupes were right down impressive.

So what did Tadge do to make things better?  Well, he did not do jack shit, in fact, he made things considerably worse.  The rear glass shrunk, losing some weight but this loss was surpassed by the addition of FAKE buttress resembling pillars and absolutely idiotic glue on rear quarter windows.

Interestingly enough, the slope of the rear glass increased, shorter steeper glass and those idiotic pillars recessing the glass and reducing the former laminar flow high pressure area. 

To top things off, due to fake quarter windows and recessed rear glass, the rear visibility disappeared completely.  The visibility was not great before but now, there is none to speak of.  If the new safety regulations mandating rear view camera as a standard equipment were not looming around the corner, the Stingray buyers would be truly up shit creek, regarding the rear visibility.

Could things be done better, with form following the function?  Of course they could be but... like with everything else related to this latest Corvette abomination, the worst possible and fully non functional solution was chosen.

Thus, now, there is no rear visibility, there is no weight reduction and on top of it, due to the extra drag, the top speed has been reduced (along with possible fuel efficiency).  That hatch SNAFU should be worth at least 5 mph in top speed reduction and even though top speed is not a real life problem for US buying shoppers, the PRINCIPLE of the design improvements has been compromised, returning Corvette to late 70's and (questionable) appearance taking precedence over performance.

As a side benefit, the drag coefficient and top speed have been permanently removed from GM advertisements, since GM   prefers not to advertise specifications inferior to models preceding the new car.