Parsing out who are Bloom's guys and who are DD's guys doesn't make sense as the vast majority of the players aren't scouted by the CBO prior to entering the system. It's really the BOS system that we can track: the moves that were made and the players that eventually made it to BOS that matter.
Part of the Fernandez ranking, I believe, was that they were told there's a chance that he could impact this year's BOS bullpen.