1. Speed up the site. I hate paying for a slow site.
2. Auto play the next episode without changing the screen size.
3. Auto HD playback (if available).
4. An editable queue.
5. An app. I really don't see the need for an app until some of these problems/suggestions are implemented. After all, the best app in the world won't do any good if you time out before you can watch.
6. Social media (i.e., Facebook, Twitter, etc.) integration. While I'm not into all of my friends knowing every boring detail of my life, there are plenty that are into this stuff. Just don't pull a Facebook by sharing our info on the social sites without our okay.