One thing DS9 never really explored in depth was how smart Kira probably had to be in order to rapidly learn all the new Starfleet tech and procedures. Nobody ever suggested she had a hard time serving as an equal to the Starfleet officers. She probably never had a full pre-university education, much less four years at the Academy. They should have had a scene where she came off-shift, replicated a raktajino and then slid behind a desk in her quarters for another six hours of studying. I would have also enjoyed a scene where Jake is bitching about school and she sets him straight about how privileged he is to have the opportunity for a good education and how some people (implied to be her) never get those opportunities and have to work even harder just to keep up.