Completely agree that it's a much needed feature. We've worked around that by setting up an nginx server in AWS which has proxies to the https://*.appspot.com

Completely agree that it's a much needed feature. We've worked around that by setting up an nginx server in AWS which has proxies to the https://*.appspot.com https://*.appspot.com name. So it's still SSL all the way, but we just didn't want appspot.com as the URL we gave out.