It's easy to get fooled by Grichuk hot streaks because when he's hot, he's really hot. You want to believe he's turned a corner. Then the cold streak comes and you realize that he is what he is, and always will be. Even if Springer were healthy all season I would have expected Grichuk to play a lot more than Tellez (minor league managers will always favor the vetrins), and I expect nothing different when Springer gets back. Unfortunately, Grichuk is probably never going to be used as a true 4th OF as long as he's on this team given his "tenure" and contract. If he ever was used that way, then he'd be a lot more valuable over the course of a season.
Since 2018:
Grichuk: 3.8 WAR, 1587 PA
Pillar: 5.1 WAR, 1545 PA
Expectations for the Grichster should be pretty darn low at this point.