DRK used to have haste. Blood Weapon in SB gave 10% haste and Delirium increased it's duration. So its ironic how SB's Dark Arts spam was reworked into shadow spam but somehow became less fun.

3.0-4.1 is still peak war and would be considered broken by todays standard. Berserk was 50% attack power (eventually getting nerfed to 20%, then removed entirely), Bloodbath synergized with Berserk and Vengeance for insane heals for 25 secs (90 sec cd btw, the same as Berserk), Storm's Path was 100% reprisal uptime, Storms Eye was slashing debufff for NIN and other tanks, Homlgang was 3 mins (same duration as PLD Sentinel), Unchained removed damage penalty of Defiance, cross-class with MNK meant it had access to Mantra, Second Wind and Internal Release (crit up).

Needless to say WAR is still paying for that and its probably why it hits like a wet noodle despite showing "bigger" dmg numbers. You would think that bigger numbers would do bigger dmg but apparently quantity > quality. Its no wonder why DRK, an ogcd focused job is better than WAR, a gcd focused job. All they need to do is buff IC/PR by like 20-40 potency and that should bring it in line with DRK and GNB. No need for excessive ogcds reworks, just make the gcds hit harder during bursts which ironically WAR used to be back in 3.0. It just didn't line up with NIN's TA so it was "balanced". If it did line up with NIN TA, it might have gotten a rework mid expansion.