The designer could play with the physical make up of a golf shaft instead of inventing the more exotic material that cost beyond reach for the average golfers.
Skinny hosel design which changes the ID and the tip diameter of the shaft. More issue to deal with. Instead, they could experiment and play with the thickness of the material around the tip and the construction of the shaft to achieve desired result. I'm sure someone has a software to simulate all this without a lot of cost to do it in the lab. Super computer and software could be rented per time used.