Looking at the default icon a bit more closely, the gradient kind of messes with my eyes and makes the S look fuzzy. If you compare it to other common icons, y

Looking at the default icon a bit more closely, the gradient kind of messes with my eyes and makes the S look fuzzy. If you compare it to other common icons, you'll notice none of them transition quite so harshly that the gradient produces more contrast than the other shapes in the picture. The new icon provided simplifies it a lot, and makes the S more readable, but at the expense of throwing away any hint about what the app is for. I think it'd be best to just tweak the original icon's colors so it looks more clear, while keeping the keyboard key look to it.