That's basically "let the firmware try to sort itself out", which might work if there was temporary corruption in the FTL metadata and it knows enough to try to

That's basically "let the firmware try to sort itself out", which might work if there was temporary corruption in the FTL metadata and it knows enough to try to recover that by doing some sort of block-scanning, but if there's further damage beyond that, it won't have any effect. Still worth a try, however.