I don't know what can honestly be done for Final Fantasy XIV at this point.

[Avoidy]

lmao literally who cares when you can easily play any single job in this game at max level

opinions from one-trick ponies should be massively discounted

this isn't like lost ark where you have to cough up real money to level another job to raid ready level

For the "just play all the jobs" idea to even work, we'd need (to start, at the very least) a gear progression setup that wasn't timegated and cockblocked by the devs nonstop. The moment you try and get anything better than crafted gear or dungeon gear (lol) the game starts timegating you like crazy at pretty much every level, even for the stuff that isn't BiS. Want raid gear? Once a week at best. Want the good tome gear? Weekly cap on how many tomes you can earn. There's also the time investment of leveling a job to cap, the sheer chore-factor of it, and the matter of personal preference. Saying this as someone with every combat job at 90; I'm not touching SMN in its current form, no matter how "optimal" it becomes in the content I enjoy, because I don't enjoy it and I'm not about to spend weeks gearing a job I hate. It's that simple. I'd literally rather take a nap IRL than deal with that. The selling point of the job system is that you can play every job in the game, not that you have to. And that message is seen in every job progression system in the game. A lot of things would have to change for us to feasibly reach the sort of "screw balance, just play everything" goal you're talking about here, unless your only goal is buying 610 crafted gear and chilling in content where balance doesn't matter.

Bit of a pipe dream now, but I wish we had actual teams dedicated to each job. And those teams talked to each other, and to the raid teams, to create an actual holistic team based experience. Instead it's really obvious that they have like 4 guys responsible for every job in the game, so we get ez homogenization design choices and imbalance issues that make people question whether or not the jobs were even playtested.