There's a difference between being actually different and being clunky/annoying for the sake of being different. For example, if Overpower required you to hit enemies with the very tip of the cone in order to do any damage at all, it would surely be a unique skill, but a very vast majority would be celebrating from the rooftops when they nerfed it into a circle 'get hit anywhere inside of it to do damage' ability. it's why you saw so many angry at Overpower's circleification compared to Veil getting streamlined. Overpower was intuitive to use on its own and very not-jank, thus its change was uneeded. Veil & Passage both had/have jank to them, thus why you see plenty of attitudes towards Veil's change as positive comparatively to Overpower's change.
People enjoy difference, so long as said difference isn't rooted in the ability being clunky or jank. Passage is a prime example of this. It's different, but its difference is rooted in it being extremely annoying to use, thus plenty of people would rather see it homogenized to being temperance 2.0 than having it exist in its current form. Similarly with Divine Veil, if the ability could be manually procc'd by the PLD without saccing a GCD to clemency at maybe like half shield strength, or if it could be procced by OGCD heals instead of purely GCD ones from healers, I doubt there'd have been many arguments towards wanting it simplified.
Or even better example, Living Dead. The skill was absolutely unique, but its uniqueness was rooted in it being effective garbage to control & use compared to the other tank options without a white mage cheat button, and the infinitely vast majority would rather have seen it be turned into hallowed 2.0 than kept as it was. Luckily Square managed to make it infinitely more usable while keeping a flair of its uniqueness.
For example, if Passage didn't require a channel and was deployed on the ground like salted Earth, and also had the ability to warp it around by pressing the button again during its duration so it could be more useful on movement heavy damage like DSR gigaflare, Passage would be infinitely more usable, less clunky and still retain its uniqueness among the tank CDs due to it requiring actual thought than the traditional 'fire and forget' 90% of tank CDs are. When some people argue about these skill's jankiness, they're likely not hoping the skill just gets homogenized, they're likely hoping Square will do something to the skill to keep it unique while making it not ridiculously stupid to use compared to other abilities.
Also besides the point, the people arguing for simplification of skills and the people arguing about jobs being homogenized after the fact likely aren't the same people. People can have differing opinions and be after different things.