In basic theory, DPS has never been the "highest standard of party utility." The only standard for utility is whether or not it helps you clear the fight. When we're given an A3S or A4S with very tight DPS margins, that means utility with a DPS focus is important. When we're given an A8S with very tight eHP margins, that means utility with a survivability focus is important. There is one constant here. It's not DPS. It's a focus on clearing content.
How good PLD is will always be balanced on the back of content design. For the most part, the DPS checks in Midas are pretty tame and do not require a DRK comp by any measure. For three straight major patches now, we've seen PLD completely demolish DRK in terms of their usefulness in EX trials.
Divine Veil getting reduced from a 150s CD to a 120s CD is a huge deal -- especially when paired with the changes to STR and VIT. That's 20% higher up-time on a ~3k raid-wide shield. For many fights, it results in an additional activation and AoE coverage you otherwise wouldn't have had. Shield / Sword Oath no longer breaking your combo does change the way you play because it gives flexibility to a job that was notoriously inflexible before. These days, I actually feel more restricted playing WAR due to stack manipulation and debuff up-time issues than I do playing PLD. That was not the case in Gordias.
PLD was largely fine in 2.X. Again, you can complain about design but that's a separate issue from balance. PLD was the highest single target DPS MT and OT and had some very substantial advantages over WAR. Block with an i135 shield was much stronger than it currently is and it worked on meaningful attacks like Critical Rip, Revelation, Flatten, etc. Shield Swipe was at worst DPS neutral and actually worked for TP conservation. RoH was their only combo so threat never was an issue.
Most of PLD's most glaring practical issues didn't even emerge until the dust settled in 3.0. By that standard, it took SE the exact same amount of time to adjust both DRK and PLD. And, if you consider DRK's adjustments meaningful and PLD's not, that's just blind bias.
And level of commitment to DRK and WAR? What commitment? They hit a redesign home-run with WAR and have just stayed the course since. If you think PLD in its current state is as bad as WAR was before their redesign, again, that's just blind bias. DRK? Since 3.0, PLD has gotten more buffs than DRK and 3 very favorable EX trials in a row. I'd say it's pretty blatantly clear SE is more committed to helping PLD.