Thrill not providing mitigation is partially compensated for via it also incorporating the old Convalescence effect - they need more healing, so they *receive* more healing too.

They also get Equilibrium, which is a powerful instant heal followed by a powerful regen effect. PLD isn't just missing a personal mitigation button, they're *also* missing the personal healing button too (because no PLD is using Clemency due to it being a substantial DPS loss. *Best* case scenario is it just replaces an Atonement...)

PLD will still be behind the curve if they haven't figured out something for Clemency or some other means of giving PLD more self-healing. Almost the entirety of their self-healing is contained in the Req window (8 actions at 400 potency each), so if their need for self-healing doesn't happen to coincide with when their Req window is coming up, they're up shit creek without a paddle. Meanwhile, WAR and GNB have powerful self-heals on a 60 sec cooldown, DRK has TBN on a 15 sec cooldown (instead of the ~25 of other tanks), more baseline mitigation due to Oblation charges, and for whatever it's worth they also have the most self-healing potency on their 1-2-3.