Long term, the ideal outcome for democracy is that everyone votes, and that everyone feels free to vote their conscience. That's where ranked ballots has a huge advantage - I prefer them to straight proportional representation, which is frequently used in Europe, as an electoral system. Although I don't necessarily believe that third party "steal" elections, there is a constant pressure on them not to run in situations where they would split the vote and cause a significantly less preferable candidate to run.
Quite frankly, ranked ballots make it more likely that more political parties will arise in the US, and eventually gain representation in Congress. This is a good thing, since modern parties have proven that ideological differences can be savage within the parties and lead to wings of the party representing people who are not ideologically close - IE Dave Brat in Virginia, who was an extreme-right winger who won a purple area because he won a primary.
The discussion over who should and shouldn't win is best left to the people of Maine, who have clearly had their say, and are being heard more efficiently than ever before.
