I don't really see how this is specifically a knock on the rebuild, though.
'LULZ, the 'rebuild' didn't even produce the two best players that came out of the farm system during this period...those guys were only 2 of the top prospects in all of baseball, who immediately started producing at the MLB level as 20-year-olds.'
If those were the two best and they were just meh, then that's an obvious knock on the rebuild. But just because we won't produce anyone else at that level (which still does remain to be seen, Dansby has been really freaking good this year and arguably better than Albies) doesn't really say anything in particular about the quality of the rebuild.
If you don't see how Coppy/Hart overall didn't make good use of our existing major league talents then I don't know what to tell you.