Imo, we aren't clogged and have shown no issues with being clogged. There is no guy on the AAA roster that is blocked that would be on the opening day roster otherwise. David Murphy was let go because they don't want 5 OFers who can't play any IF. It's a waste of a roster spot. Honestly, the difference between Castillo and Murphy at this point is very slim. Being willing to put anyone on the bench no matter the salary will prevent them from any clogging issues.
We're not clogged in the rotation. We're not clogged in the bullpen.
Where's the clog?
Also, teams that start the season with a lot of question marks (3b, LF, C, Carson Smith, Koji, Porcello, Kelly, ERod) don't typically run the table over the course of a season.
DUMBrowski took over the team last year, watched them day in and day out and decided the only way to fix the mess was blow it up. Castillo and Pablo are both done in Boston. I wonder what he thinks about the long term prospects of Porcello.
The bullpen stunk last year and DUMBrowski did some work to fix that in the offseason. He still needs to remake the starting rotation, but that's harder to do than add in bullpen arms.