THe big problem with that deal is having to replace Eovaldi with the savings. It's a deal that made more sense prior to 2020, when the savings at least made it easier to get under the tax limits.
The sox are at a point where they not only need to keep Eovaldi, they probably cannot even realistically consider switching him to the bullpen. At least not if they hope to compete in 2021, which, per Tom Werner, they do.
That said, now watch something like that deal happen this off-season. After all, this might be a "sell high" opportunity on a pitcher whose problem has never really been the talent...