this is an MMO SquareEnix

[Flatopia]

This is not just a MMORPG THIS IS ALSO A FINAL FANTASY TILTE. you have to have to realized that many people are not here for the MMO part but of the fantasy that comes with final fantasy games. didn't Yoshi p back in ARR period said he wish he could bring blue mage but he didn't know how to make it feel like a true blue mage back in the day. The reason why it's a limited job is maybe they couldn't balance it with in HOLY TRINITY (tank/healer/dps)

Blue mage is vastly different between games with only one similarity, they use enemy skills. The method of learning is often very different in between games and more often than not have a very small pool of mostly damaging skills. The only reason it's as it is now, is that the development team believes the 11 incarnation to be the only real one.
Knight typically does really powerful physical attacks
Dark Knight typically sacrificed HP to empower their attacks
Ninja typically can throw objects
Samurai typically has Gil Toss
Scholar typically has mastery over ancient magic and not fey
Black mage typically has a lot more debuff skills like bio
White mage typically does not have many ties to nature, and having earth aspected magic is usually Black magic's thing
Summoner typically has more than 4 summons, and are usually much bigger
Bard typically has more buffing and debuffing songs over means to do damage

Face it, literally every job had serious changes to it's core elements to fit, yet this time it's apparently too far fetched to design a job to fit?
Nonsense.

[Jukebox12]

yo

paladin is not a knight more like a white knight for one. doesn't drk sacrificed mp to deal dmg. ninja fuma, samurai dealing high dmg has gil toss. scholar does have ancient magic (cannot think of the name right now. black mage is a magic user that deals damage of the magical side. white mage is a healer. Summoner eh this is a hard one but I really don't think the multi summon at a time or having all the primals to summon is a balance issue. Doesn't Bard uses instruments to buff or debuff allies I think we have that. they took things that made jobs unique and made them different but the some sort of a way that there are the same

[Flatopia]

paladin is not a knight more like a white knight for one.

Fun fact: Paladin is called knight in nearly every final fantasy game, like 14. And is called PLD in abbreviation. Learn somethin' new.
Also you admitted yourself all those jobs were changed for this game, they were fundamentally changed to adapt and it's great because they feel like the belong while maintaining the job fantasy!

It's almost hilarious that we keep going to the Red mage isn't a true red mage argument, or samurai, or scholar, or black mage, or other jobs that got changed as a reason to justify the argument that BLU would work in the holy trinity system.. because most of these arguments stem from final fantasy xi which hey.. ima going to news flash this.. THIS IS NOT 11!

Actually I base my knowledge off of every mainline Final Fantasy. I even agree that this isn't 11, and that assuming Blue Mage has to work like them is silly.
Also Blue mages have mostly been damage dealers with each hit usually having a status tied to them. Water with confusion, true with frog, fire with enrage, etc. They honestly aren't that niche as their actual crux is that their skills aren't just "damage" but rather damage with a small twist. Never anything gamebreaking to be honest. The most powerful skill they have is might guard, which is just a kinda big damage mitigation tool.

But still, ironically, this is simply telling that the biggest reason most people do not think BLU could fit, is because they lack proper imagination to what it could be. They think it has to be a perfect mold, ironically making themselves sound like it has to adhere to the 11 design more than anyone that supports the idea of BLU as a job.
The core identity is, and always will be simple.
It uses enemy skills, the range of effectiveness ranges from okay at best to situational at worse. The methods to obtain these range from learning the move via getting hit by it, to getting the last hit on specific enemies with different skills.

Please do not misunderstand what the job is about, and spread that misinformation. Go into any FFX discussion and say "the blue magic is hilariously broken and over powered if used right". They'd laugh you off.

TLDR; the only thing holding this from being a real job to most people is lack of creative thought, and misunderstanding of the job. Every job in 14 is not like their original counterpart, so even if the thoughts of what BLU was were correct- they are irrelevant minus the single core of the job. It uses enemy abilities. That's. it.

[Darkpaw]

Please do not misunderstand what the job is about, and spread that misinformation. Go into any FFX discussion and say "the blue magic is hilariously broken and over powered if used right". They'd laugh you off.

Really we're going to use a single game for the basis of your counter argument? FFX.. So blue magic existed in no other game but ten? The concept just sprang into being there? so we're completely disregarding 5, 6, 7, 8, and 9? Because in a majority of those games.. blue magic is when utilized properly.. completely and utterly overpowered and broken.

As for the remark that this isn't a real job.. That's misinformation.. because it's not your idea of a real job that can go raiding, or pop into a roulette, or doing all content the second it's released. It's still a real job. It has a unique weapon, a unique battle system, unique content to show it off. it will be the fourth caster of this job.. whether it resides in the limited system or not this is a real job. It's just not the job YOU want it to be. Because the Dev Team we have been blessed with that revived this game from 1.0 into it's current iteration has a different vision that I'm willing to hold off passing judgement on to see how it functions and what the future holds for it. Before I take a dump all over their creativity and their vision. They've done right by us players so far and while they aren't above reproach and they do make mistakes. Each of us should have enough respect to give their vision a chance before we condemn it and burn it to the ground. Far as I see it and I feel.. this backlash and insults leveled towards this content and this job. this VERY REAL JOB is shameful and disrespectful to a team who has worked hard to do right by us players... the inability to even give their vision a chance.. to even experience it before we condemn it or give feedback on it.. is insulting each and every member of the dev team who worked on this content.

[Flatopia]

Really we're going to use a single game for the basis of your counter argument? FFX.. So blue magic existed in no other game but ten? The concept just sprang into being there? so we're completely disregarding 5, 6, 7, 8, and 9? Because in a majority of those games.. blue magic is when utilized properly.. completely and utterly overpowered and broken.

As for the remark that this isn't a real job.. That's misinformation.. because it's not your idea of a real job that can go raiding, or pop into a roulette, or doing all content the second it's released. It's still a real job. It has a unique weapon, a unique battle system, unique content to show it off. it will be the fourth caster of this job.. whether it resides in the limited system or not this is a real job. It's just not the job YOU want it to be. Because the Dev Team we have been blessed with that revived this game from 1.0 into it's current iteration has a different vision that I'm willing to hold off passing judgement on to see how it functions and what the future holds for it. Before I take a dump all over their creativity and their vision. They've done right by us players so far and while they aren't above reproach and they do make mistakes. Each of us should have enough respect to give their vision a chance before we condemn it and burn it to the ground. Far as I see it and I feel.. this backlash and insults leveled towards this content and this job. this VERY REAL JOB is shameful and disrespectful to a team who has worked hard to do right by us players... the inability to even give their vision a chance.. to even experience it before we condemn it or give feedback on it.. is insulting each and every member of the dev team who worked on this content.

Did you read what I said?
I specifically said there are many different ways BLU works across all games featured. What I said was that if you take the idea of what blue mage is in XI or V into a X conversation they will immediately assume you don't know what you're talking about- because you wouldn't. This was to hammer in that each BLU is different by a pretty wide margin.
The rest is simply trying to shame people for expressing displeasure with what was presented to them, as is their right, and thus truly can't or shouldn't be addressed. It's better to let the community and developers tp speak their piece and actually come to a conclusion on how to appease everyone.