Design of DRK and PLD

[Shurrikhan]

By having specific job synergy, you create an imbalance which then goes against the philosophy of any group can clear any content.

No, it doesn't. Any set of jobs can have different but (roughly) equally-valuable synergies. (See Overwatch, for instance, whenever it's in a good patch. For almost all hero/job choices, the way you play is more dependent upon your comp than not, and yet even at the professional level, it could take a month or more for even a map-specific meta to outperform comfort picks or intentionally off-meta --harder to counter-- comps.)

Having synergies isn't damning; it just means you have to balance comps, not only individual jobs.

It just comes back to whether players actually want XIV to be a team game beyond merely picking an angle, and perhaps an 'out' or 'in' position if there are more ranged than melee, before performing their mostly unchanged T&S dance. So far, that seems a no. We seemingly like as little effect from playing with others as possible, or indeed of any chance, anything outside our control.