When is the last time we even had 8 prospects or "suspects" beating on the MLB door, at the same time? We have over 10, now, and that's not counting Bello, Wink and Wong, who just graduated. I agree, none on this list, other than Casas & Mayer are close to sure bet contributors, but many have enough promise to be optimistic about, if you choose to be.
Casas
Mayer
Rafaela
Mata
Walter
Murphy
EValdez
Kelly
That's a decent 8, with some fringy types like Abreu, Hamilton, RHern & Ort.