To be more specific:
I thought Dukat's character became completely absurd. The entire scene with him and Kai Winn chanting in the fire caves would have fit better in "Ernest Scared Stupid" than in any semi-serious scifi series.
also, and this bothered me the most, the black and white flashbacks for the main characters felt like really bad tv drama kitsch. I half expected to hear Dawson's Creek theme music playing in the background.