Duvall--like a lot of players--appears to do better when the plays every day and not that well when he's relegated to a platoon or part-time duty. It's a small sample size, but check out his 2018 after he came over and contrast that with his 2019 when he played everyday after coming up from Gwinnett and 2020 when he played every day from the get-go.
We will have money to spend this off-season, so I think patience is in order before talking about whose options will be picked up. Could be any combination of either/neither/both.