Earlier this week, I took a look at whether the Yankees were shifting too much. To summarize my findings: the Yankees have shifted more than any team other than the Astros in 2018, but their pitchers put up significantly worse numbers with the shift on than without. The Yankees pitchers drop in performance with the shift on was the second-largest in the league, behind only the Mariners.
That, obviously, is a bit problematic from a strategic standpoint. The whole point of the shift is that it is supposed to help the shifting team prevent runs.