They need to equalize the raid wide utility of Paladin & Dark Knight to bring them in-line compared to Warrior in the OT slot.
Personally i195 PLD flat out in A1S P1 and A3S P1 I am just pushing 815-850dps MT in Sword Oath keeping hate requires I have a Ninja and be very confident in my healers - which I am but it certainly doesn't feel right and the increased damage I get from running like this is hardly worth being a hairbreadth away from losing enmity; having to be sure time & rotate my abilities exactly, to cycle through the appropriate combos in a precise order to even manage it. With all that - I personally can't maintain those numbers for an entire encounter either, I eventually have to swap into Shield Oath, it's practically unavoidable.
I have watched Warrior, and even played my own Warrior - we pull significantly more damage, have better tools, and we aren't laboring under any obvious deficiencies. On Warrior (which I have by no means mastered) I easily can push higher numbers than my absolute best as Paladin (which I have played primarily in raids since Twintania) with less gear. My Paladin damage is just insignificant while my Warrior sustains a higher output for the entire encounter without the accompanying risk or effort.
Personally I feel at loss when I read these forums - the imbalance seems pretty clear to me but maybe on a spreadsheet or in theory it balances out; but in practice it doesn't seem to work that way - at least not from my experience. The addition of a third tank and a raid with tight damage checks has really thrown the tank meta into a spotlight. There are huge flaws of concept with their Job design and encounter construction when you specifically need to avoid certain group combinations because they're impractical at best; See Dark Knight Paladin compositions. It makes little sense to have one Job with easy access to raid wide mitigation, slashing debuffs, and the highest potential damage because it is guaranteed to be included even required; Warrior shines because it has the most utility and fits the meta perfectly.