It would definitely help, although arguably if dealing both gets you a cheaper SP, then it accomplishes the same mission another way.
The Sox absolutely do need some minimum wage contributors. But Chavis has no real position and Dalbec is blocked by Devers at his best position, and moving him to 1B just holds the fort for Casas, although Casas is a minimum of 2 years away even if he just flt out destroys high A and AA pitching this season...