I think that DRK very much appeals to players who are used to games with a faster baseline GCD. That's why a lot of us miss the old Blood Weapon haste buff and would like to see it become baseline. Your higher oGCD usage also helps to fill this gap somewhat because it effectively 'halves' your effective GCD. You press a button between every button at baseline.

WAR is the BLM equivalent on tanks. That's a pretty deliberate aesthetic choice as well. Much, much more of your damage is weighted on the GCD. If anything, I think WAR should have fewer directly damaging oGCD abilities than it does now, replaced by more oGCD effects that charge up your next attack to get you bigger numbers. Same result, different playstyles and aesthetics.