I read that the reason Ezri Dax was added to the cast was because it was out of the question for Kira to be the only female regular. I have to ask why? It was the last season anyway so who cares? I liked Ezri but I'm sure DS9 would have been fine without her.
I do think it's interesting that there were several recurring male characters such as Nog and Garak who could have been upgraded to regular status to replace Jadzia but there were no female characters available to fill her place. Of course there were recurring female characters but the only ones with any depth were Kai Winn and the Female Changeling and they could never be regular characters.
I do think it's interesting that there were several recurring male characters such as Nog and Garak who could have been upgraded to regular status to replace Jadzia but there were no female characters available to fill her place. Of course there were recurring female characters but the only ones with any depth were Kai Winn and the Female Changeling and they could never be regular characters.