There's a few things I think it's missing:
1. Dark theme. Please please please I want this
2. Flairs. Those would be really helpful
3. I'd like a page like Reddit's where you can quickly look through your comment history. Not necessary, but it'd be nice.
Other than these though, I'm loving the site <3
For a dark theme you can use Stylish for chrome They have a dark theme for Snapzu.
I desperately want a dark theme as well.