Sure, but even 5 years ago people in other MMOs (GW2 at the time) told me you play FFXIV if you want ballet-like highly involved fights. That's the standout feature. You're not going to backpedal on your USP, as a development team.
And to stick with the comparison, that'd be like backpedalling on the everyone-is-a-DPS of Guild Wars 2. Which they did, and it broke everything and they had to do years of damage control until they finally got it stable again. The game was designed to not have healers/tanks, they tried it anyways, everyone told them it's a bad idea, well, it was a bad idea. Likewise in FFXIV, fights are constantly requiring the next ballet step, and if you were to try change that now you'd have to invest an obscene amount of work. You'd have to, among other things:
* Scrap and reimplement all jobs.
* Tweak or scrap+reimplement all raid fights, in particular the tougher ones since they can be done synced for some challenge. Since you're also redoing the jobs, you basically have to start at the drawing board with all fights as major parts of the kit changed.
* Since the jobs are being redone together with the group combat system, you probably need to send hundreds of people combing through all of the thousands of quests to find those that need tweaking or reworking.
* Once that is done, you can begin the work of balancing the new combat vs the new jobs, which usually takes 2-4 expansions in most MMORPGs if they do a major base-combat rework (not many did, but EQ1 and DAoC come to mind).
* Once that is done, we can evaluate whether the new state is better.
And don't get me wrong, I'd love quite different and hence intentionally unbalanced classes. Class-based games work better if yes, sometimes Picto is the only job balanced to be the damage caster in this fight, you will wipe if you bring somebody else. Other fights its Black Mage. And maybe neither of those two can solo quests or FATEs, but Red Mages can, that's their thing, they can solo. I love that design, it is way more evocative and I miss it from older MMORPGs. But it's utopian to think a game as old as FFXIV would go back, re-do its core design principle, then do a full 360° cleave and chop all its current design off. You're talking about an FFXVII, the third MMORPG, basically.
Plus there's another thing: 25 of 26 jobs are working fine with the combat design. One is not. Much like we all groaned at them trying to buff everyone ever since 7.0 instead of just finally nerfing Picto, hard, why would you not simply change Black Mage if they're the odd one out?