It started with some of Cora's comments, which obviously must have been endorsed by the team, about focusing more on the present. I think they sent a clear message that this was part of why Bloom was let go.
From an article in the Globe on Breslow's introductory press conference:
Team chairman Tom Werner described the Sox as being “full throttle in every possible way” in upgrading the roster.
“You need great players. It’s not about selling the team. It’s about having great players,” he said. “Generally, you need players who have high WAR to be a winner. Raffy Devers is a star that will be with us for a long time, but you need to complement with other talent.”
Breslow described an “unwavering commitment” from above and that all options would be available to him in building the roster.
“Resources are not a problem here,” he said. “The commitment to winning from ownership is not a question here.”
Even for top-tier free agents?
“I don’t see financial resources as an eliminating factor,” Breslow said. “I think that was something that was clear in the conversations that we had. Now obviously we have to line up on a number of variables here. Interest and fit among two of them.”