One of the debates about the Astros rebuild has been whether they're actually adding pieces that can eventually contribute at the major league level or just adding depth that creates winning minor league teams, but won't help in the ultimate goal of consistently competing for championships.
Tony Blengino of FanGraphs recently ranked all 30 orgs based on impact minor league talent and the Astros ranked....first!
Blengino lists 8 guys who he sees as making a meaningful impact at the major league level and that doesn't include Foltynewicz or any of the group that made their debuts in 2013.
Also check out his post on impact minor league talent in general here, and his 16th-30th ranked teams here.