More personalization of the keyboard

I like they add more options to customize the keyboard in as the custom theme as SwiftKey themes, like the key borders, we can't change the size, the color, the bright of this color, the text type and text size (comment if you want to share more options you'll like to have on the SwiftKey). I guess it will improves the rate of that keyboard (mainly the key borders option from the default keyboard themes already is on the gboard)