No, that would not be better.
While technically the "top screen" is a touch screen, it has a plastic protector over it. In order to make the whole thing a touch screen, that plastic would have to be removed. And then you would have fingers and stylus running all over the upper part of the screen, which is the part you watch most of the game on. It's pretty obnoxious on mobile devices and it would be no less obnoxious on handhelds.








