^ For me Nicole was what won me over almost immediately, her sweetness and difference from Terry really had me invested that this was going to be a different character with her own strengths and weaknesses.
I agree that Nicole had a better handle on the character (and her craft) than Farrell. It made sense that the newly joined Trill would need time to sort out his or her personality, and would not be fully formed and articulated, as Jadzia was. NdB's sense of comedy was more developed, and she did well delivering those lines in which she said things that seemed incongruous with her personality (unfortunately, she would apologize afterward). Nonetheless, NdB could explore the inner conflicts of her character, and not appear resigned the way Farrell was in "Dax." My issue is that this new Dax need not have been a regular character.