Seriously, this question has been nagging me whenever I think of the final season of the show.
Introducing a character so late in the game didn't really make sense to me (except as a chance to finally allow a Dax and Bashir to have a relationship), I think introducing her and devoting a few episodes to her took away from the show's momemtum.
Frankly I think the writers could have used her slots instead on the other regulars (esp. the underused Jake Sisko) or some more exploration of the Dominion War or the Pah Wraiths.
Introducing a character so late in the game didn't really make sense to me (except as a chance to finally allow a Dax and Bashir to have a relationship), I think introducing her and devoting a few episodes to her took away from the show's momemtum.
Frankly I think the writers could have used her slots instead on the other regulars (esp. the underused Jake Sisko) or some more exploration of the Dominion War or the Pah Wraiths.