Design is not a matter of opinion. It's not a matter of opinion that PLD has numerous completely useless skills or that DRK sucks as an OT. It's not opinion that if you are OTing as PLD or DRK, half your skill set is just sitting there rotting. It's not opinion that Reprisal can't be activated while OTing in any intuitive way. It's not opinion that DRK's enmity generation when using an optimized rotation is just pathetic. It's not opinion that for some strange reason FoF doesn't buff Flash and that PLD's AoE DPS is straight garbage. It's not opinion that PLD + DRK is a terrible tanking comp. It's not opinion that having tanks that specialize in a specific kind of damage mitigation has created some serious issues with tank / content balance.

Just because you might enjoy playing a class doesn't change the facts about it. I was a PLD main and loved playing the job but that didn't make me blind from how garbage it was.

Saying that WAR should be the standard for tank design is not to say that PLD and DRK should just be palette swaps of WAR. It means that the same care should go into PLD and DRK's design and the result should have the same level of cohesion, logic, and practicality.