That system also had a good draft that year too with college players, guys who got the token A ball assignment then flew up the system in no time. Ellsbury and Buchholz were contributors in 2007. Also, consider that they came in a system where the Sox had 4 1st round picks just like the team built now came from a 2011 draft in which team team drafted large contributors to this team.
They also boasted a system in 2005 that brought in the likes of Beckett and Lowell and still had Papelbon, Lester, Pedroia, Delcarmen, Ellsbury, Buccholz, in it.
The uncertainty to me comes from the mechanism a team uses to bring talent in. The drafts in 2005 and 2011 saw the team bring in talent with 4 first round picks. Not only are the Red Sox no longer going to receive additional picks like that but for a few years now they've been unable to spend heavily after the first round and just throw cash at everyone. International pools are becoming more restrictive as well.
The parellels from 2005 to 2016 are pretty big actually, that's a good comparrision. But to me, the uncertainty comes from the mechanism to replenish that system have been stripped away from baseball. I'm not saying it can or can't happen, I just don't see how right now. Some might not care about that, but I do.