He doesn't seem like much of an improvement over some combination of Salome, Lucroy, and Rivera though. One of them (Rivera?) probably plays half the time anyway, as you mentioned. Zaun could be a huge upgrade or a small one over Salome/Lucroy, depending on how they adjust to the majors. I'm guessing with question marks already at SS and CF offensively, catcher wasn't one to be left to chance, as I said before.