Like I said in the article; last season, Gallardo pitched with a wonky arm for at least part of the season, and Matt Wieters is a very bad pitch framer.
It's pretty immediately noticeable that In 2015 (After June 1 so the pitch totals would be similar), Gallardo received dozens of calls at or below the bottom of the strike zone, whereas 2016, the bottom of the PitchFX zone seems to suddenly become a hard demarcation and you can almost count the strikes below it using one set of fingers. Matt Wieters could not get strikez low in the zone, and Gallardo was forced to come up with something else (which explains his low GB% compared to previous seasons). Here is an article from January talking about how bad at pitch framing low in the zone Matt Wieters is.
So far in spring training, Gallardo has been clear about caring less than most about his results. He's cared about velocity, movement, and location from what I can tell. I know people ran screaming from the first 9 pitches the other day, but he started hitting his spots later, and hit them again on Saturday. Looking at his pitch charts on Brooks, it's pretty evident that Gallardo stepped away from throwing below the zone last season:
2013-2015: 32.76% of pitches thrown below the zone
2016: 26.34%
2017 Spring: 31.73%
Gallardo has catchers this season that can get a call on curveball or diving slider low in the zone, an outfield he can rely on, and a homepark that is going to mute his flyballs. He's going to do better than you think.