I don't buy that Mookie did not want to be in Boston. I think now that he is with LA, he probably prefers that over Boston, but I don't believe that he would not have re-signed with Boston if the money was right. At the same time, once he was traded, I didn't see any way that he would be coming back.
Mookie was after the money, period. If the Sox had not traded him, then gave him the best offer during free agency, Mookie would have accepted. He would have possibly accepted an offer from the Sox before free agency if said offer made him the highest paid player in baseball. But I think the only reason he accepted the Dodgers' offer before free agency is because of the uncertainty brought about by the pandemic.