The main reasons behind the dissatisfaction of job gameplay

[Aravell]

Can you imagine the modern jobs playing in coils, coils feels like a different game entirely

You don't even have to go that far back to see that the design is very limiting.

Look at Thordan Unreal. If you did that fight on any gauge job, you'd see how broken they can get with any sort of downtime. You can see it in DSR too, remember how all the RPRs suffered a major damage loss unless the party held damage until close to enrage so the RPR can build their gauge.

The design they went for in EW and continued in DT is unsustainable for any job except ones that function off cooldowns. Gauge jobs just do not function with downtime when faced with their rigid design.