I agree with tanks feeling the same because they fulfill the same role and have really similar tools. But I undestand that they had to do that to not have classes being played less.(Why DRK if PLD/WAR is a way better comp)

They could try to make them more like Healers and try to make each one of them excel in something but still make any combination viable. (Which thats another whole can of worms)

But honestly I would like that at least their dps tools were more unique because right now we have: (oversimplified)

PLD/GNB: 1 Combo and 1 Damage Combo (PLD has Requiescat / GNB has Ammunition outside his combo)
WAR/DRK: Manage Gauge until Burst Phase (War is a bit more gauge dependent / DRK has Fray and Mana Skills)