I'm definately going to finish the season. I'm fairly sure I won't quit. I like the main characters too much. Even if Scorpius doesn't grow on me, he can't be in every episode. Crais was the main villain up until now, but he was really only in a few episodes, it was more the threat of him that was important. I'm hoping scorpius is the same. Either way, Scorpius and Chiana combined can't make me give up on Farscape. As long as Zhaan, D'Argo, John, Aeryn and Rygel (and Pilot/Moya) stay interesting, I can stomach Chiana and Scorpius enough to atleast make Season 2 worth getting. I'm hoping Scorpius gets interesting and then having him as the villain won't be a problem anyway.
As for the last episode, I'm already wanting more Farscape, I just wish I could have it without Leather man and female Jar Jar.