Yeah, this is incredibly shitty. WARs design enables a style of play that every tank should be entitled to while DRK/PLD are given this arbitrary hurdle to jump that is independent of proper play or skill. You can say what you want about balancing tank mitigation or DPS or utility, but we should all be able to stance-dance either without penalty, or with the same penalty. WAR having this privilege is like giving a DRG the ability to live without dodging AoEs while telling NIN/MNK "tough shit, git gud and learn to dodge". In fact, now that I think of it, its the same flavor of shit as DRG's arbitrarily lower magic defense back in the day. Not implemented for any reason, just... uh... yeah, you just die more easily no matter what you do. DRK/PLD, you just have to gimp your DPS to hold aggro, sorry. Its a fundamental imbalance that arbitrarily punishes DRK/PLD for maximizing performance while handing the ability to do so to WAR on a platinum platter.
All tanks should have equal potential and ability to maximize their performance with equivalent hurdles to overcome or none at all. I'd call this an inalienable tank right. And it wouldn't require any nerf or buff to either of the three tanks, just a few potency swaps between their combos and bam, solved. This isn't me hating on WARs, its just saying we should have the same access to stance dancing that you do without having to downgrade to a suboptimal rotation. Its like if we told you you had to use SP to hold hate and couldn't BB.
Fix it SE.