It all depends on how you look at it, but Sims really hasn't done much compared to Duvall.
It's not Duvall's fault he was parked in AAA and then released.. Maybe it just means the Braves were dumb.
No one makes a trade, thinking.. gee, I bet this guy will get nontendered in 2 years, then we can get him back for free.
Sure, Duvall would have helped the 2021 Reds.. He could have taken a significant number of at bats that went to Shogo, Aquino, Friedl, and Schrock (as an OF)
How can you say he wouldn't have helped the Reds? He could have played CF just as well as Naquin did, and the Reds were desperate for RH hitting this year.
He would have helped the Reds more than Sims did (even if Sims was healthy all year)/