The 2018 Kia Optima Hybrid is a mid-size sedan with all the right moves. On top of its safe package (its crash-test scorecard is spotless) and relatively handsome looks, a fuel-efficient powertrain is subbed in for fewer trips to gas stations. For those reasons, the 2018 Optima Hybrid earns a heady 7.3 overall score on our scale, reflective of its…