Joe Washington wrote:
I too wished that Farscape had a Season 5 but I also believe that Peacekeeper Wars was a perfect finale to the show.
They did skip a little bit of character development to move the plot along. At the end of season 4, no one really gave a crap about the conflict between the Peacekeepers and the Scarans. They were concerned with theri own well-being instead. Then in PKW you have everyone harping on about how they must have peace between the Peacekeepers and the Scarans and actually risk their necks in an insane attempt to achieve that goal, for absolutely no justifiable reason.
PKW's quick wrapup also produces an incredibly broken aesop. While they were going for "WMDs are terrible things and no one should have them" they got "WMDs are awesome and everyone should have them".
You can't have an an anti-universe-destroying-superweapon message when you clearly used a universe-destroying-superweapon to solve your problem. It just doesn't work.