I mean I main PLD and cleared up to O3S and normal Exdeath in O4s and I never use Intervention, cover, or passage of arms. I use divine veil sometimes for library phase spellblade holy and meteor in Exdeath, but even then I don't actually need to use it as I've cleared O3s with DRK/WAR and forgotten Divine Veil before that was easily made up with a sacred soil from SCH. I am aware I'm just being bad not using intervention(it is hard to target on controller and my macros clips so I tend to forget it)but that just shows how unnecessary it is. All it is is a safety net, like RDM, but less effective.

It's nice to have but it is not OP or majorly game breaking in any way. All WAR/DRK really needs are damage buffs. Put DRK at PLD level and make WAR 100ish dps higher than both and it'll be balanced(enough).