We need healthy players and we need more of an everyday outfielder since JBJ doesn't look like he can regain acceptable form. I don't like playing JDM in the outfield daily as we can't afford him to get banged up. His sore back is a sign of things to be avoided. Nunez and Holt as outfield replacements doesn't strike me as reasonable. I would use Holt and Nunez strictly as fill ins for 3rd, short and second. With Devers not performing as well with the bat as expected and Pedey iffy, we can use them there.
I don't see much trade value in Swihart, Beeks or JBJ and we don't have a lot of payroll flexability so getting the players you suggest, while they would help us, doesn't appear practical.