From what I have heard, you can do asymmetrical rates with these springs. I have not seen how. I would speculate it involves shifting the location of the spring mounts on the chassis. That is only speculation. However, I suspect that adjustability is if nothing else, different than working with standard coils and would likely require the race engineers to work on something new for a bit with potentially little pay off.
If F1 ever moves away from the current setup where most of their "suspension" is actually in the tires, I could see them using something like these leaf springs instead of coils. With the use of torsion springs they have already shown that they are willing to develop different ideas if they see any advantage in it what so ever. If the vehicle requirements and packaging allowed it I could see them using a compact, fiberglass spring in place of a coil or torsion spring. The fact that the fiberglass spring packs more energy per mass of spring than steal would be attractive to a team. I expect the actual implementation would look different than what we see in the Corvette. Given the silly high budgets of F1 these days I could see them paying the high price if it offered some bit of an advantage.
Any feedback on the illustrations? I seriously am soliciting feedback with the intent of making changes for clarification.