I thought they did a decent job of reaching a satisfactory conclusion.
After reading ivrytwr3's post, I suppose the writers wrote the third season so that it could serve as an ending, should they not get another. Having said that, hard for the show to move to phase two, or whatever it was called and do something with that in just one season... or; maybe they had hoped for 2 seasons, but were given just a one season deal by Netflix to reach a conclusion....
However it was, they did a good job to reach a conclusion, which is more than many shows get, particularly those on network channels.
I liked Continuum as well, which was also given a final season to reach a conclusion, after it was cut shorter than the creator had planned for.
I also really liked Colony, but that was just cancelled after the third season. Was hoping Netflix would pick it up as they did with Travelers, so some kind of conclusion could be reached; but alas, no.