This API release contains the following improvements:
- Shipping rates can now be configured with labels which can optionally be displayed in the themes.
- Paypal express orders can now be directly patched to a processing state immediately after they are authorized by the customer without the customer needing to provide a billing and shipping address. This does not effect indirect Paypal integrations such as Braintree.
- New icon image section type in the product Content Management System.
- Return authorization shipping labels now contain the order number.
- Product customizations can now have an icon.
- Product customizations can now have the type of "color".
Those last two changes are useful for variants where you may have different colors of an item or want to display an icon to switch between variants instead of using text.