I think the scouts matter there, but it's a pretty small part of the overall scouting operation. And Hanley's issues have been A) medical and stuff you could have guessed. I had issues with the Sandoval acquisition from the beginning. Masterson and Craig are about speculation and medical evaluations largely (all are great prices if the guys could bounce back). But yeah that has not worked out and it is something Dombrowski needs to address.
But unlike most failed GM-ships, Cherington left a lot of good stuff. As I pointed out elsewhere, if you look at four years and see, "four years, one title, stacked development system", you'd wonder why he was ousted. (I am not questioning why he was ousted, there were too many losses) This is not the shambles that say the Mariners situation is.