I hope Tesla will push out an update giving us speed sensitive steering.
What you are asking is physically impossible. Sounds like you're asking for a rack which changes the ratio based on speed. As Elon noted, that requires a very complex setup. It's been done by several manufacturers, notably Audi and BMW, and with less than stellar results. It's largely been abandoned as automakers have turned to rear steer to add extra yaw moment when desired. That requires a completely different, complex, setup in the steering (usually on the shaft). Not something you can push an OTA.
All the steering settings do is change the weight of the steering, by varying the amount of steering assist. The sportier you go, the less assist, the more weight in the steering. And, if I am correct, it does already change with speed.
Tesla has engineered the car with very direct, very quick ratio steering. For one I like it.