I think maybe 5% off the top of FoF is more appropriate, especially if you want a DRK buff as well. the point isn't to just make PLD the worst DPS tank significantly because we'll just end up doing this argument with the roles reversed. Ideally tanks need to be doing very similar damage really. DPS should not be a major metric for tank preference (admittedly that's as much a game design flaw devaluing mitigation as anything else)

Do agree with the idea that things should be brought up and not nerfed down if any changes are necessary.