They are already in MLB. It's probably too late for that. It's a roster construction failure. It's an organizational development failure. It's an MLB failure (these issues happen across MLB).
The problem is that Sox ownership has more than enough money to outspend other teams regardless of dead money on the books if they have to DFA Story and/or Masa. They have a lot of money coming off the books this offseason and will be able to compete for any FA they want to. Trading Duran for salary relief is just mismanagement IMO. The reason you can trade him and not feel bad for it is because Anthony is there. It's not the reason you trade Duran and are happy to receive nothing in return.