You wrapped up a typical RRB Build Off pretty well right there. We all thrive and feed of of the collective creativity that is displayed during the event. I feel that everyone that participates can't help but build something better than they would have in the vacuum of their own garage. I know...
I bet One Vote would come in dead last if you setup a single vote poll right now that had the choices of One Vote, Three Votes, or Unlimited Votes. Just my opinion and hunch.
I also have the feeling of "if it ain't broke, don't fix it"
Over the past few years you could vote for as many builds as you wanted to. Throughout this time, I have still voted by the old rules of just 3 votes. In my opinion forcing everyone to just have one vote is a bit too restrictive.