I think you're dramatically underestimating how much of the casual fan base would turn on the team if they sold Freeman and Swanson. In a vacuum from a competitive standpoint, you should absolutely trade both of them if you are confident that Freddie isn't resigning. In reality, I think there is a near 0% chance that either of those two would be traded. If they go 3-12 leading into the deadline and get swept in 5 games by the Mets I might up those odds to 5%, but I just can't see it happening unless Freddie literally says 'send me to the Red Sox and I'll come back next year.'
i think Swanson would be ok to move. Freeman is much trickier. but you’re probably losing him anyway (not that casuals will totally grasp that necessarily).
personally i’m all for punting the rest of this year. sell whatever vets you can.