Changing stream titles/games
Some things I have noticed:
1. Editing your title and game opens a new popup in the browser. Dragging the mouse to highlight any text and releasing the button with the cursor outside of the window closes it, losing all your new changes before you can save them.
2. There is lots of room beneath the live preview of the stream where this stuff could go, so that changing your game or title on the fly was more efficient.
3. Stream stats at the top of the window would be nice to be able to repositioned somewhere else, instead of being locked in place permanently.