I think the biggest thing you guys could do would be to fix the cars you have already made; such as tires cutting into the fenders when you lower the suspension. (Eg: BMW 435i) Better headlights, taillights, and body proportions would also be nice.
I hate that people use x class and turf cars in tournaments, but it was still my primary source of in game credits. With the 150k room removed and free tokens taken away, I have to race the bots over, and over, and over...