I disagree that it's counterproductive or irrelevant anyway. In the near term it's inconceivable that someone that isn't R or D will win Maine even with RCV, it

I disagree that it's counterproductive or irrelevant anyway. In the near term it's inconceivable that someone that isn't R or D will win Maine even with RCV, it will solely allows voters to additionally indicate support for a third party without spoiling their major party preference. Basically I'd only expect it as enabling the the Libertarian or Green party to start challenging the majors after 20 years of iterated elections, which gives plenty of time to deal with the perceived issue of Maine voting Libertarian instead of Republican and a Dem winning by 1 electoral college vote (which seems an anyway implausible result).