The best changes that the devs could make to address several balance issues among casters,
because the current state of casters is downright bad, would be to give an instant role action resurrection with a 5-minute cooldown to all caster.
They could allow Red Mage to keep its chain rez ability as it’s part of the job, and Summoner could recover its resurrection faster when using Phoenix, for example, resetting the cooldown to 0.
Why give it to everyone?
Let me explain.
First, this would make all casters reliable during progression phases.
Second, they could reduce the DPS disparity between the so-called "pure" and "support" categories because currently, the difference is around 10%,
which is just huge—especially considering that the Pictomancer has quite a few support options, so that category essentially doesn't exist.
If they really want to emphasize the support aspect, they need to add real support spells and not just a raid buff that increases RDPS because, as of today, almost every job has one, even those with relatively high DPS.
Instead, they should add more synergy, like in the Stormblood era—for example, options to give a portion of your mana to a healer, an effect that allows the group to move faster for x seconds,
or an effect that lets melee DPS ignore positionals and attack from a further distance for x seconds.
In short, they can innovate to strengthen the so-called support jobs, because currently, most so-called support jobs only boost RDPS, but many jobs, even the most powerful ones, sometimes have that effect.
Meanwhile, others, like Machinist, who don’t have anything, have strangely low DPS.
So, if they want to recategorize support casters, they need to completely rework them, and the same goes for physical ranged DPS.
And if they make the mistake of removing the resurrection ability from Summoner and slightly increasing its DPS, they won’t solve the problem because it would push three casters out of the progression phase.
Red Mage would become the only "Prog Mage," and since resurrection is a powerful ability, it would suffer a 10% damage penalty because, for some unknown reason,
the devs believe that resurrection alone justifies such a significant DPS difference between jobs in the same role.
There are currently three major inconsistencies disrupting the balance among casters.
The first is resurrection, the second is Summoner, which has 99.9% mobility and doesn’t seem to fit within the caster category,
and the third is the colossal difference in firepower between the pure damage and resurrection categories.