While I think Farmer is largely expendable, who becomes the backup SS?
Polanco, probably, as it stands. Gordon in a pinch. Possibly Lewis, depending what happens at 3B (if Miranda resurrects). But they need somebody who can go 15-20 days if Correa hits IL. Or maybe that's some IF combo that includes Lee and rearranging Lewis/Polanco/Julien.
I guess this comes down to if Correa will be 100% next spring. If not, I'd keep Farmer as insurance.