There were definately dissapointments... There are always failures.
The first crop to mature under Riccairdi was the first dissapointing crop in my lifetime. Phelps, Hinske, Wells, Hudson, Lopez, Rios. At the end of 2002 I thought things looked great, at the end of 2003 I thought they looked really great (Phelps and Hinske's down 2003 was just a bump in the road). What little did I know.
And this crop was up and down. Wells, Hinske, Rios even Lopez eventually all produced complete decent seasons.
The Lawrie, Snider, Thames, Gose, Drabek, Arencibia, Hutch, etc. crop is the worst I've seen in terms of young players maturing as expected.
I actually blame anyone for this. I think there is luck involved. Just because you had a bad crop doesn't mean you give up on the system. Re-invest in young players, things will work out better next time.