You CAN write it off all together, because there are no fights where these become an issue, and the developers are creating content around it.
Believe it or not, the developers tuned the 3 very closely. Even giving Warrior Fell cleave, it's not in the lead by something insane like 200 DPS.
Nearly all of the complains on this forum are unfounded, and just coming from a bunch of players who don't want to adjust themselves to the newer content. Instead they want the game to cater to them.

News Flash: Dark Knight is 30 DPS behind, and that's in line with all of this games balancing on a TRAINING dummy.
Step into a raid, and none of the sustained 4-6 minute parses matter at all because as a tank, you have to adhere to mechanics, and you also need to adhere to well played Damage Dealers who probably do more damage than you can, unlike Duty Finder where we tanks end up on top.
No, you will not be tanking Alex Savage in Sword Oath the entire fight, nor will you tank the fight without using Rage of Halone several times to establish enmity.

The only fight in the game that ever tested TP limits before now was Turn 8, and we have never seen anything like it since.

Do you feel your job doesn't do enough DPS? Then stop playing it. The numbers we pull are entirely by design for a reason. But a gap of 70 DPS between the 3 is nowhere near imbalanced by anyone's standard.