| B | ↘ | C | WC_Data got worse |
| ⇢ | B | WC_Data::set_props() added | |
| ⇢ | A | WC_Order::maybe_set_user_billing_email() added | |
| ⇢ | A | WC_Data::get_prop() added | |
| ⇢ | A | WC_Data::set_prop() added | |
| ⇢ | A | WC_Data::__construct() added | |
| ⇢ | A | WC_Data::set_defaults() added | |
| ⇢ | A | WC_Data::error() added | |
| C | ↘ | D | WC_Order::payment_complete() got worse |
| B | ↗ | A | WC_Order::read() improved |
| A | ↘ | B | WC_AJAX::add_order_shipping() got worse |
| C | ↘ | D | wc-core-functions.php ➔ wc_create_order() got worse |
| B | ↘ | C | WC_AJAX::add_order_item() got worse |
| C | ↘ | D | wc-order-functions.php ➔ wc_create_refund() got worse |
| B | ↛ | WC_Order::__construct() removed | |
| A | ↛ | WC_Order_Item::set_all() removed | |
| A | ↛ | WC_Data::throw_exception() removed |