Whatever you do to one side, it is highly recommended to do to the other. It keeps everything in "balance". Since you are having problems excessive pad wear on one side, I would go ahead and replace both calipers, pads and brake hoses. Your not talking a lot of money for rebuilt calipers and new hoses and if you only do one side now, a couple of years down the road the other side can go bad and then you will be chasing this problem again.