I can absolutely agree with you in this situation. I've been waiting weeks to be able to build the K.S Polestar. It was one of the cars I was looking forward to driving when I bought the game .I hope to see this car released in the future for purchase in a car pack, or be able to buy it for free if you're a deluxe edition owner. One way or another I think we should have access to the car. Regarding the Camaro with the blower. I think you can start off the game with that car if I'm not mistaken. I was able to have the choice of picking the car, but I don't know if anyone else was. Anyway yes there are customization options in this game that should be able to be applied to cars, but they aren't there. Which in this case kind of annoys me.
Cheers!
adamburger16