LOL, you guys are crazy. Healthy debate isn't it. I can see how one might say the louvers can make the rear look narrower as it draws eyes to the louvers which don't go to the edges of the car.
But as many have mentioned, it does add a bit of cinema/occasion that is somewhat lacking. When I first saw Huracan I was NOT a fan and was set on the more chiseled hardened lines of the Gallardo. I see the louvers as a step in that direction. I used to also believe every mid-engined car MUST show the engine off.
But now I realize some of the coolest mid-engined cars DONT show the engine or show so little of it who really cars. Also the shape of the car makes it clear its a low wide exotic and the huge vents tell you there is something thumping under there LOL