Let me brush off my We Didn't Start The Fire keyboard. I'm going year-by-year down, so this will seem like a strange order.
Yoan Moncada - Below expectations, but an above average major leaguer when healthy
Lucas Giolito - Good
Michael Kopech - Failure
Reynaldo Lopez - Failure. EDIT: As a starter
Carson Fulmer - Failure
Zack Collins - Failure
Zack Burdi - Failure
Luis Basabe - Failure
Alec Hansen - Disastrous failure
Dane Dunning - Good
Spencer Adams - Failure
Micker Adolfo - Failure
Eloy Jimenez - Failure
Luis Robert - Good
Dylan Cease - Good
Blake Rutherford - Failure
Jake Burger - Good
Ian Clarkin - Failure
Luis Gonzalez - Failure
Nick Madrigal - Failure
Bryce Bush - Failure
DJ Gladney - Failure
Jonathan Stiever - Failure
Matthew Thompson - Failure
Andrew Dalquist - Failure
Jimmy Lambert - Failure
James Beard - Failure
Benyamin Bailey - Failure
James Beard - Failure
Codi Heuer - Good
Jared Kelly - TBD, but so far, failure
Yoelqui Cespedes - Failure
Norge Vera - TBD, but so far, failure
Seby Zavala - Good for what he was
Gavin Sheets - For what he is, good
Andrew Vaughn - 50/50, not looking good
Bryan Ramos - Looking positive
Lenyn Sosa - I like him, but others don't
Oscar Colas - Pedro hates him
Carlos Perez - Failure at this point due to defense
Jose Rodriguez - TBD, but if he were further along he'd be knocking on the 2B door
Colson Montgomery - May be the crown jewel
Wes Kath - Failure
Romy Gonzalez - Good
Sean Burke - TBD, not looking good
At this point, it's not worth highlighting anymore because they're all TBDs.
Obviously no one would have a 100% hit rate, but unless the prospect had otherwordly talent (Robert, Moncada, Cease, etc.) or drive (Burger), Getz did damn near nothing with them.