There's a very good reason why we still have the same menus, check-boxes and buttons we had decades ago: They stand the test of time. Every now and then, UI-gurus declare a new age of user interfaces. 20 years later, we happily click on buttons and choose from menus.
I can't see how creating 653 profiles for all brightness/volume-combinations I could ever want would increase the joy of using the device. Still, even if I did: I'd need some means of activating a certain profile while I'm working in an application. And that was the whole point: You cannot do this if applications run full screen and full screen only.