WooCommerce Subscriptions

Right now, when a subscription is on hold, there are no additional steps allowed/required when reactivating. I would like to provide a coupon code incentive to subscribers on hold to reactivate (e.g. “Reactivate your subscription and take an additional 20% off”) This would require the insertion of a coupon form field in the subscription status page. Right now there is no way for a subscriber to do things like add a coupon or even modify shipping methods. I think this would be amazingly beneficial to most stores that use subscriptions…if we can get those on-hold accounts to convert to active, it could really help boost revenue.