Not as excellent, but still quite good, was his post all-star 2013 - .280/.371/.458.
You and I are both skeptical of defensive WAR, but I'm much closer to a believer when dealing with infielders than I am with outfielders. He's been very good to elite defensively for three of the last four years as measured by defensive WAR. And he's fun to watch play.
So if the guy is healthy I see him as more than a minor upgrade over Frazier.