This discussion got me curious about whether Kapler's pitching staff management is really out of the ordinary or not, so I downloaded the 2019 NL team pitching data from Fangraphs and took a look:
One thing that surprised me is that the Phils are actually above average in IP/game started for the starting pitchers. I would have guessed they would be below average.
NL average is 5.41 IP/GS, high is 5.80 (Nationals), low is 4.96 (Brewers), the Phils are at 5.47 (slightly above average).
Next is the reliever data:
NL average is 1.07 IP/relief appearance, high is 1.17 (Pirates), low is 0.95 (Nationals), the Phils are at 1.05 (slightly below average).
In general, at the team level, IP/GS and IP/relief appearance are negatively correlated. Teams that let their starters go longer tend to change relievers more frequently.
Based on these data, I'd say that while you might not like the way Kapler manages his pitching staff, he appears to manage it more or less the same way everyone else does in 2019.