The infield shift is evolving, and the Rockies are evolving along with it.
When I first wrote about the Rockies and the shift in April 2014 (about the 2013 season), I concluded that while the Rockies didn’t shift very much the previous year, they still did pretty well at turning groundballs into outs. That was because they had great defenders: Troy Tulowitzki and Nolan Arenado on the left side, and DJ LeMahieu (for most of the season) and Todd Helton on the right. That didn’t mean that the Rockies should disregard shifting; it only meant that the Rockies’ infield defense was good even without the shift.