I see no reason why a gamepad can't be used with the new UI. I do, however, understand how a gamepad wouldn't be able to use all the functionality of a new UI, but that shouldn't matter. I should be fully capable of using the new UI, having my gamepad pull up the basic menus and macro pallets like before. Obviously there would be issues with a gamepad switching between multiple chat windows or utilizing drag-and-drop features, but thats ok. I've been playing with a gamepad for 10 years now, don't make me give it up in order to use a better UI. Let me setup the UI the way I like, but continue to play the game with my gamepad.