Springer was one of the last players drafted and trained (mostly) by the old regime.
Making the transition is not automatic or easy... but this is not a matter of guys scuffling along hitting .220 for a while until they figure things out. This is player after player completely flatlining when called up. This years crop... and before them people like Singleton and Santana.
Then there's the problem of the players who struggled here and then pulled it together after changing teams...
Edit:
White is the one guy who showed a more typical pattern of someone who was in a bit over his head but still had his moments, kept competing and showed a few flashes.
Everyone else pretty much hit like a pitcher from Day One.
I will say this for Bregman... his defense at a brand new position has been impressive.
Luhnow took over as GM 6 months after Springer was drafted, so he spent 2 1/2 years in the minors under the Luhnow regime.
As for Reed, yes, he "flatlined" with a .539 OPS in his 45 AB sample.
45 ABs. Moran, 19 ABs. Bregman has played 4 games.
I forgot Tony Kemp. He actually did fine, .238/.340/.357 in 42 ABs. Worth is a journeyman non-prospect and doesn't count.
I also forgot Preston Tucker. He had immediate success last year.
If anything, I blame Luhnow/Hinch for some odd timing of call-ups in some cases, and not giving guys enough of a chance in a few. I don't understand your assertion that the problem is "scouts and minor league coaches about just how they're identifying and developing offensive talent."