Its not entirely complete, but fully playable outside a few QOL bindings. For example, as far as I know you still can't drop items or split stacks of items...obviously anything requiring typing will require you to use a keyboard.

I use a gamepad and it works great, I just have to also have my wireless mouse within reach for random odds and ends out of combat

Worth mentioning that some new bindings and tweaks were made in yesterdays update, so they are improving on it. I can place and remove map markers with my gamepad now, and I love it. I use 360