One more loogy would have been nice, though it's said some Yankees don't have strong platoon splits. I don't see Mejia as a loogy or being used at all, but I hope to be surprised!
My first reaction is that he squeezes the strike zone, but I don't know. Could be something else. The game Berrios started in NY recently was painful to watch due to an umpire who wouldn't call strikes for Twins pitchers.