The broadcast bar is hideable - tick the relevant checkbox during set-up and it's gone.
Yay. Something on the UI to hide/unhide in-game would be nice.
I guess your in-game "bitrate" also controls your resolution? I did auto-detect and got 2844kBps and a 752p res stream. More options would be nice.
Also I don't think my mic works, because it goes into the line-in and not the mic-input. Selecting source here would also be nice.
Then there's my original concerns... push-to-talk on mics, ability to control overlays, broadcast videos, etc.