That's potentially a very weak pair of corner outfielders.
Not to mention, why the weird alignment of Verdugo in CF and Duran in RF. Both are clearly better suited to be switched back.
I like Munoz as a 2B/utility INF candidate, along with Arroyo, assuming the former doesn't have a fit and storm out of camp again. But neither is a guaranteed solution even at 2B as it is. I don't think Munoz' bat will play in LF any better than Benintendi. At this point, you taking a guy who has "disappointed" with a .751 OPS since 2018 and replacing him with a guy whose career OPS is .736 in limited play. You're just replacing a disappointment with a surprise and not taking into account that there, at best, the same hitter, and you're re-arranging the defense to accommodate him.
If the Sox can trade Benintendi for a pitcher, that's not necessarily the worst idea. I've thrown out Benintendi for Matt Boyd or Benintendi for Reynaldo Lopez as trades that seem fair. Don't expect much more. But if the Sox do that, they have no good internal candidates to play LF. There OF prospect depth begins and ends with Duran, who would be wasted there. And Munoz is only 16 months younger, so there is no argument that he is more likely to get better than Benintendi over time...