I was fine with the Phillies sticking with Rojas, but they didn't seem to be, even after Pache was no longer there to take some of that playing time. Going with Hays against RHP seemed to be as much about them being down on Rojas as high on Hays, and even when Hays was out they chose to give Stevenson a little run in CF.
In the end Nick and Marsh also weren't bad, at all (albeit only against RHP in Marsh's case and only offensively in Nick's case). The overall mediocre showing by the Phillies OF included Nick and Rojas's first two months as well as Merrifield and Pache.
Marsh put up a 3.1 BBWAR in just 476 PAs. Santander was 2.9 in 665. LF was really not the problem in and of itself but with Bohm and Turner not producing at a high level in the second half, JT's days as that kind of hitter done, and Stott also a disappointing bat, it's an easy place to point.