As of the Interface, I prefer a very simple and basic interface as I often monitor/use the Pool via several mobile phones/Smartphones.. So Suprnova's Concept is too keep the Frontend clean, simple and easy-to-use without much fancy stuff and have a powerful backend.
Agreed, that IS good. But I'd probably still consider a color change, even slightly, anything to differentiate it from pool.mn or any other dodgy pool people setup. Suprnova obviously has some serious beef behind it, uptime is good, and its always got the latest coins. So its only natural it LOOK different as well as be different. Just my 2c anyway.
Oh and fantastic to hear about SSO!!!

edit: hahaha you read my mind! Awesome.
http://i.imgur.com/nFMGbUp.png