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But that's OK.
I don't compare Langerhans' one anomaly season at age-24 in AAA to Saunders' record. Langerhans hit twice as many HR as he'd hit before or since.
Saunders had an .866 OPS at advanced-A at age-20; then an .858 OPS at AA at 21; then a .922 OPS at AAA at 22.
To me, that shows upside. Upside that he might never reach (true enough); but upside that Langerhans never had (in my view). My view is that the fact that he was always pushed up the ladder every time he had success at a level is what kept him from developing a consistent approach -- given that he is not a "natural" who's been swinging a bat every day since age 12 like Smoak.
Just my view.