For a show car it's not functional but on a circuit racer the FD does benefit from a good bit of downforce on the rear. The side skirts help smooth airflow coming under the sides of the car a bit, that rear diffuser creates negative lift which sucks the ass end of the car to the ground, and the wing is adjustable for trim so you can dial in the level of downforce depending on how fast the track gets and how loose the rear is.

So yeah, the aero bits on that car are actually aero bits. And they ain't cheap neither.