Betts is great, but it's only one year. Both the Padres and Dodgers plan on sticking around longer than that. I don't blame them for trying to lessen the return.
I don't even get why the Padres are in on Betts, and their offer shows how much they really want him.
The Dodgers might be desperate for an all-in win in 2020. Several of the top teams got weaker, and the NL lost a lot of FA talent to the AL. That being said, asking them to part with several top prospects with 5 years of team control, each, for just a one year window opening is clearly an issue to them. Very reasonable.
If I were the Sox, I'd forget about forcing Price on the Dodgers, but would insist on Eovaldi for Pollock or Pederson as a way of evening out the money issues we face longer term. Maybe get 2 good prospects added, and if we have to add Workman (FA after 2020), then so be it.