HN,
Isn't the phugoid period of order 10-20s, and so near the ground, at close to maximum angle of attack, and with a big change in thrust, would it be perceptible in light of other changes?
Am I right that the reason to damp the phugoid is for comfort when making subtle changes when cruising, and thus that the FBW system applying damping within 10s of the ground might be a complication that the pilot does not benefit from?
I understand that the A330/40 was later found to suffer from an unusually pronounced phugoid mode and needed reshaping during testing, so active control alone might anyway not be sufficient to arrest its development when flight conditions are changing quickly.