Well, yeah Asymetric suspension's been mentioned before, but nobody's really ever taken it seriously from what i have seen. It woul dbe great to have for any track, so you can squeeze the maximum out of the car but you might have issues with corner weights on some courses
Would deffinitely be good for the oval, which is sort of the ultimate testbed for the engine (producing the most extreme forces and the like). Looking at it this way, anythign good for the oval is a step forward for the physics engine, making the nuances of the other courses all the more accurate.
Before the realism nazi's come barging in, yes it is realistic to be able to set your setup this way, though it might be limited by what type of the suspension the vehicle is equipped with. Don't think you'd get the intended result trying it on a leafsprung car.
+1