My suggestion for how to fix the current "Synergy Stacking" meta.

[Nominous]

Don't you think that would be a bit silly?

I'd agree with you if it weren't for the fact that they literally already do balance based on those things you're describing as folly to balance around. Like I said, it's not the amount of people that take advantage of it that matters, it's the visibility and perception that does. You can't fix the latter, which is why they do make changes to Jobs in the first place, aside from general QoL adjustments.

Why do you think Disembowel got nerfed, and NO other resistances got nerfed coming into 4.0? Because of Job identity? No. Because of the double-ranged meta in 3.4. And just like now, any Job could clear anything just fine. It's a tired argument, because just like then, it is incredibly strong. For that matter, PLD could clear any content in 3.x too, but people still complained about not being in the Meta, and being mostly ignored for changes in 3.x and where do we see PLD now? You think that's a coincidence? It's the community's feedback, which is usually based on the upper limit of a Job's performance, and group strengths. So you say the community's perception is at fault, not the game? The community's thoughts (including about the meta), and game balance are directly tied to one another, and we have tons of evidence of that.

And since you bring up fighting games, me too. And frankly, it's not a 1:1 comparison. Fighting game 'meta' has far more variables, and can be overcome by even more variables. Good match-ups, match-up knowledge, player matchups and knowledge, and just generally being better with your character. In XIV, you can't really overcome a "Top Tier", because they factually are just stronger, or as a fact, just offer more to the party. Some of it comes down to what is being emphasized as important, too, which is partly the community's issue. Part of the onus is on the developer there to emphasize what's important in their own game too though, since of course they're the ones creating it. Right now, they've emphasized party synergy elements. 3/4th of the present Jobs have something significant to offer the party, with about 7 of those (almost half the existing roster) receiving these elements in 4.0. They're pushing this aspect of the game hard, while leaving some Jobs untouched in hopes of creating diversity, but instead, those Jobs are just viewed as lacking, and rightly so. They're in the minority (only about 3 of 15 Jobs).

Now, it's not that you need to overcome the "Meta". You don't. But it's important that if one exists, it's one that is based more around auxiliary elements (like cross role) than it is anything else.