Good point about retaining all three, Betts, Bradley Jr and Bogaerts maybe difficult. That would lead me to believe someone like Benintendi is untouchable. He's under team control for what, another six years? (at least five) Why would you even think about trading him? You need low cost control guys to go with high end players which we will certainly have in couple of years. Luckily, Pablo and Hanley contracts will be coming off the books as free agent signings will be pending on some of our younger players.
Swihart could be another option in left field, moving Beni over to center field. Moncada could also play outfield, depending on Devers' progress but it would also be nice to simply plug in Moncada at 3B for next ten years.
Sox can be in thick of things for next three years. Porcello (3), Pomeranz (2), E Rod (4+), Price (2 or 6), Wright (4+) can be counted on to provide quality starts. We'll need some pitching depth but it's good place to start.