I really think that Dick, as Batman now, should have a cadre of Robins instead of the one. It'd work perfectly - Steph, Tim, and Damion. Yes, I know Damion's not a favorite around here, but use what exists. Tim would be the more Detective-y of the trio, doing all the hard work and research. Damion would snark endlessly, demonstrate how uber smartsy he is, and show off his superior fighting skills by getting smacked around. Steph would be the fun, light-hearted, occasionally sensible but mostly high on life Robin that would keep the emo-ness of the family down.
Because honestly, I can't think of Steph as a character on her own. She NEEDS people to bounce off of.