ERod is a tough call, due to the uncertainty of his health. I was thinking more about JD, Eovaldi & Barnes. Although the first two are signed through 2022 and could be part of a winning team, that year, neither are part of the "beyond" part of the 2022 and beyond philosophy.
I'm not saying this would, could or should happen, but in theory, we could trade JD, Eovaldi, ERod & Barnes- paying some or much of their contracts, and still stay under the tax line for 2021 while adding some key young players or prospects to the longer term plan. Those trades, alone, could maybe get us to a number 15 in the farm rankings. A strong draft could get us to top 10 status.
A strong farm is not all we need to be back near the top by 2022, at the earliest, but it sure improves the outlook.