USPS Shipping Method for WooCommerce

It would be ideal if a default shipping rate method could be set (i.e. USPS – First Class Mail) under WooCommerce > Settings > Shipping > WooCommerce Shipping.

Setting a shipping rate would eliminate one additional mouse click during the label creation process. While not an issue when printing 1 or 2 labels, when a store prints dozens of orders at a time this becomes tedious.