ESPN just put out their MLB Farm System Rankings and listed the Red Sox at #13.
Last Season Rank: 14th
Top 100 prospects: 3
Ownership has made it clear that the Red Sox are purely a business and that going above the CBT line is not part of their business plan. That means the farm system will be counted on more than in recent years with the success of the scouting and development group providing reasons for optimism: Triston Casas, Brayan Bello and Jarren Duran look like core players among recent prospect graduates (you might include a few more players) and there should be a couple more coming from the group of Roman Anthony, Marcelo Mayer, Kyle Teel and Ceddanne Rafaela.
Right now on the major league roster, only Rafael Devers is projected for 3+ WAR though, and the second-best projection belongs to a player with 0.1 career WAR in Vaughn Grissom. I don't know exactly how this puzzle gets solved, but I'm not blaming the scouts and coaches.
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How bright is your MLB team's future? Kiley McDaniel ranks all 30 farm systems