Two level apps list

Is it possible to have two level of app list, so it would roughly behave like this: the first level should be the alphabetical list just as we have it now. After we get to the alphabet we want, a swiping gesture toward the center of the screen would trigger the second level carousel, which enable the list of second letter of the app (in case the app is sorted alphabetically) or move the app up and down (in case apps are sorted based on usage) within the alphabet list. Optionally, releasing the touch on the app could trigger pop-up or launch the app. In my opinion, it would improve one hand usability, as you can potentially reach your app with only one continuous touch. Furthermore, it would be very helpful if you have a very long list of apps with same first letter that could consume more than whole screen.