Adjustable suspension would add an entirely new aspect to the handling of cars, as well as static appeal. My BMW E46 is nearly impossible to control, and i think if i were to make the suspension as stiff as a rally car's, i would be able to use the throttle around the corner. Lowering and "stancing" the car adds appeal as well. Yes, you can make a car ricey just by stancing it, but rice is nice. I would highly reccomend adding this feature along with rally cars(toyota celica, subaru WRX, ETC.), off road tracks, toyota brand cars + bodykits (atleast bumpers and stuff) all in one package dubbed "The rally update".

Many thanks
-Curlyawesomeace