I TOTALLY agree with you. Messed Up is amazing. I can't wait to hear the studio version, but nothing beats Sara's clenched fists and voice-cracks in the live performances... she puts her all into it.
What do you mean? These are the chords in the song. They'd have to add random parts to do what you're asking, which would make this song sound really odd since it's such a "typical" 80's-sounding pop song.