A:AnswerYes, it does work with ATS. One issue I've had with it is the wheel drifting out of center in sharp turns, but going back to the pause screen and unplugging and reattaching the USB cable fixes it.
A:AnswerShort answer is no, not easily.
The wheel requires aftermarket adapters to opt for a different wheel, and even then, the stock wheel is not fully removable without modding.
For a removable/swappable wheel, opt for the T300 or TX-PC wheel bases.
A:AnswerIt can be done by binding the gas and brake pedals to the (A,B,Y,X) buttons but I can see this being very difficult to pull off when it comes to racing with that configuration.