The current options are hidden away in a sticky, and aren't exactly user friendly. There's no central repository for feedback per user, for one. You can't expect people to use an option that's hidden away from them and is a usability failure.
Don't get me wrong, I'm against a feedback system here as I am certain it'll be abused. But don't claim the current system is being used as a measure of how well the feedback system would work as it's a completely kettle of fish