I think I would move (some) to the gauge, Divine might, Atonement and Req kind of makes the most sense, I don't really want PLD's gauge to become a big mess. I'd also think Confiteor ready is kind of redundant as it counts down with your REQ. FOF Imo should just stay as a normal duration buff it might be a bit confusing to be with all of the other gauge effects.

I think if they really want to keep fight or flight (despite it being basically spent mostly on your burst), they could give the PLD something like red wings or something more visual, feels weird that war/drk has this constant effect on them, but PLD's don't really get any visual effects while in their burst.

I dunno in general PLD's animations, Effects and gauge could all use updating.