the biggest improvement it makes is that the space allocated to each button is massive, so as long as you tap somewhere remotely in the vicinity of the button, it will register. it's also designed to provide the most space to buttons you push the most often, meaning it will actually improve the controls to all the games you play using this app.

download skin: http://tinyurl.com/ac1basic-v15
i also had a hell of a time trying to figure out how to do this on my own as there's no good tutorials for how to make skins yourself. all the ones that are out there only teach you how to visually alter the default skins, so i created a template & instructions for how to make your own from scratch & completely edit the layout to your preference.
download tutorial: http://tinyurl.com/skintutorial1
enjoy!