What does a science-oriented person act like? I thought the character, and actress, were great. She really did seem to be the most mature and psychologically healthy person of everyone there. She was analytical, but she had a healthy joie de vivre. She was one of the first to see the Ferengi for who they were and not judge them for it. She balanced her love of Worf, and Klingon culture, with her own needs and wants. And she wasn't afraid of defending herself verbally or physically. She could tell people when they were being stupid or wrong and not be a jerk about it.
In terms of her being utilized as a science officer, the show had less sci-fi stuff anyway. They had so little need for a science officer during the war that after she died they didn't have an on-screen replacement. It was only one aspect her personality, but she certainly demonstrated her proficiency in it in "Emissary" for example.