As much as I like Pine in the role, I would've made Kirk dead dead in Into Darkness. It's an alternate reality, and I think they could've played with that more. So, Spock would become captain and I would've introduced a new, female first officer (perhaps Janice Lester?) in the next film. And maybe had some sparks between Spock and Lester, which causes tensions between Spock and Uhura.