I've played this game extensively with a gamepad and also used a keyboard several times. I have a lot of experience in previous games and MMOs with using keyboard/mouse. Let me break the ice and say that there's nothing about this game that a keyboard user has an advantage over a gamepad user. Just because gamepad has less buttons does not make it less useful.

I will never play this game normally with keyboard and mouse, and the same went for XI. These are terrible games to use keyboard with. If you can't play the game and operate quickly and efficiently with a gamepad, there's something wrong with your controller skills. The controller covers all buttons you'd ever need, and macros are done in the blink of an eye.

Doesn't matter what the medium is, it's how you use it. And in this case, the gamepad is more than enough.