It would be very beneficial to implement the recently announced Let's Encrypt ARI natively in the Webinoly framework to improve the security posture and reliability of the proxy engine.
In some edge cases, ARI may be a handy tool, such as if LE needs to revoke the certificate prior to expiration for compliance or other reasons. ARI can inform the client before revocation and allow it to do early renewal and avoid service disruption. If transparency timestamps from CT logs fail, hence would require need to reissue the certificate.