It's genuinely frustrating to have to put extremely ugly aero on a car to make it properly viable. A lot of the times the wings and splitters just do not match with the car at all, and totally ruin the look of them. Very few cars get more then the one aero option, and even fewer get enough to actually customize a car to your liking. The Need for Speed games get tons of customization all over the car, you get an actually decent amount of bumpers, splitters, wings, and even a number of body kits. Not every car gets a ton of options, some only get one or two, but those options were at least made with some attention to how they actually look on the car. So the fact that Forza still has absolutely zero unique body customization for \~90% of the cars in game is honestly kind of embarrassing. Really the only way you *can* customize your cars is with liveries, however making your own livery (especially one that looks good) is an art in and of itself, and most people aren't willing to put in that kind of time and effort. So outside of liveries, there is basically nothing you can do to make a car uniquely yours, or even to make it look not hideous outside of not using aero at all, which is just shooting yourself in the foot in most scenarios. 

There have been 6 Forza Horizon games now, how have they not improved aero design at all?