Really this is the same as if we had an up votes only system which some of us have requested for awhile. The only difference is instead of having a slider you have fixed % in form of stars.

The argument here has been that you can game the system too easily in an up votes only system and there needs to be a tool to counter gaming the system.

This has been the sticking point. While I prefer the up votes only system and have been an advocate for it for about 7-8 months now, but I was finally convinced not to push for up votes only by a post from @bitcoindoom on the vote and Game Theory.

I still think we COULD mostly be an up votes only system and tell people ONLY to use the down vote for abuse, plagiarism, spam, and gaming the system.

The problem is we can't force people to adhere to that.