I'd also like Passage of Arm to be easier to use.
At the minimum, have PLD to protect allies in a circle and make the "flash buff" longer.
At best, PLD should either drop a protecting bubble or have a buff equivalent to WHM.

Cover, please update it.
Make it a partial redirection that applies Intervention buffs to the target or something.

Hallowed Ground, I feel that it's kind of okay with Bulwark filling the holes in PLD defense.
But its cooldown is slightly too long for its effect.