I tested gamepad support in 1892. I'm not a gamepad player but I can give you some feedback for that. I'm sure you are making many couch players very happy with that functionality.
For the moment I still see some work to do. It's not always picking the right controller.
I'm using (newest gen) XBox Controller and have two paired, but only one was connected ("switched on") and I had NO working gamepad in the game. Second try I connected both controllers and the other which was switched off before worked. Next time I started the game, the other one worked.
I think it is complety ok to automatically pick one controller if more than one is connected but you seem to pick just "controller 0" if it is connected or not. I'm not sure how a connection is detected but the axis should have valued around 32k when on and 0 if off.
Another problem is with looking, it is splitted between the wrong axis on the right stick and the trigger buttons:
right stick up looks to the left
right stick down looks to the right
left trigger looks down
right trigger looks up
So for the moment I cannot test how it really feels in the gameplay but I will do that, when the axis are fixed.