A:AnswerYou will void the warranty once you open up the keyboard but I think Razer makes some keyboards with the purple switches you just have to research.
A:AnswerYes. But make sure your game is support the keyboard.
As far as I know, COD16 to 18 is fully support keyboard and mouse. It will work well with Edge in Xbox.
A:AnswerNot that clear switches. But it has the Razer™ Analog Optical Switches with customizable backlighting powered by Razer Chroma™ RGB. Razer Phantom keycaps should also still work with this keyboard.