Well, if you have the wheel off, it's only another 10 minutes to put the new shoes on. Try it, see what happens.
My OEM rear brake shoes went from being good to not working at all in season. Had them relined (they turned to stone). Now even with the weak front brake the the bike stops a lot better with the combination of the two. Plus, with the cost and lack of availability of rear drums, I'd do it just as a precaution.
It's eight and a half gallons of gas; and an engine. What more do you need?-- BMW R80G/S
Save lives. Legalize lane sharing.
Cow eyes don't glow.