she [...] was smokin hot.
Which, personally I believe was the only reason she was hired and one of the big reasons she gets defended, along with the concept of her character being very interesting. She was eye-candy, just like Troi.
Of course it is not just the fault of Farrel or Sirtis, both a "joined personality" and a telepath would be hard to portray believable and the way their characters were written did probably not help them much. The writers of DS9 have admitted themselves that they created Jadzia and then had no idea on how to write her or what kind of character she should be and that inconsistency shows.
Seven was, imho, about the only time when eye-candy met "competent actress" AND "consistently written character"
As I said before Farrel convinced me as the femme fatale in the Mirror Universe, so she was perhaps not a bad actress, just the wrong actress for the role?
To me Geordie was more forgettable than cringe-worthy like Jadzia, I never flinched when I heard Geordie's voiceover at the beginning of an episode, or groaned because I was afraid that the episode would feature him.As for worse actors, try geordi, wesley, neelix, ok their characters were awful, but the actors were seemingly awful as well.
I actually like Neelix in some ways, he frequently is annoying, but sometimes he;s just this Space Mr. Rogers. The biggest beef I have with him is 1) That the space rogue described in the series' bible sounds 10 times more interesting 2) That he stayed when Kes left.