FFXI gamepad configuration support hasn't been updated since well, probably launch, and with newer types of gamepads released in the last few years - there's definitely some gaps showing.
More modern gamepads are the Xbox 360 controller, and say, the Logitech F710 and F310 gamepads. The newer gamepads have analog left and right triggers which end up as being inaccessible in FFXI gamepad configurator since they are no longer buttons, and instead are un-mapped throttles.
The logitech gamepads have a legacy mode in which you're somewhat able after a LOT of finagling to get to work. But the Xbox 360 controller has no such thing, and as such is unusuable when playing FFXI on PC.
Anyways - my 2 cents - would be very nice if I knew that newer gamepads would still be configurable for FFXI going forward, instead of having to hang on to 5 year old gamepad.