WooCommerce Subscriptions

Currently the subscription plugin can grant the customer the membership[ associated with the subscription product at initial purchase. It would be very helpful to have the renewals check the product again and grant the customer the membership associated at that time. For example a customer buys in January and gets the January membership. I change the membership associated with the product in February to the February membership. Then when the customers renewal processes it adds the customer to the February membership automatically. In this way, the customer always gets access to the months for which he has paid.