Phantom Jobs are a step in the right direction but need iteration.

[Aco505]

a heck of an imbalance that ultimately reduces choice

If different jobs work better with different specific phantom jobs or actions, then that's actually better than previous iterations. In Eureka and Bozja, you mostly had fixed loadouts when it came to dealing damage. Casters, tanks and healers had extra options with stuff like Flare Star, Irregular/Blood Rage or Seraph Strike but there were caveats as, for instance, the former was mostly for BLM since FS was clearly designed with them in mind due to the prohibitive MP cost.

I'd rather have different jobs be able to choose between several options than what we have now, in which most jobs should just go pSAM if they want damage after all relevant support roles are covered. Ironically, it is tanks (and to an extent BLM again) who get more options to play with: pSAM, pBerserker and pMNK. If some jobs lean more to a specific set of actions, that's good variety. Within the tanks, PLD/GNB prefer pSAM while WAR can work very well with pBerserker.

Letting the different job kits interact with actions differently is what makes it fun, considering that the point of this content is to go wild and do things that are not possible in the main content of the game. The issue lies in how some jobs benefit way more than others, which is most obvious with the caster DPS and especially in OC. BLM tends to be the best because of its synergy with Field Operation actions while elements like caster rezz become irrelevant within BA, DRS or the Forked Tower. Only SMN is comparable at level 70 and with some holster dump meme builds at 80 using (Deep) Ordained. Lost Slash was interesting in Bozja precisely because it allowed certain jobs (DRG, MCH and WAR before the IR change) to do something different, even if the end result was just buffing a big action, but so is Flare Star on a surface level before you get into how to manage it properly with stuff like Font of Magic. Or how you had to delay or take your rotation into account when doing Double Edge L in Eureka.

Essentially, the majority of players can just play what they want and the content will be cleared just fine but I see no issue with more synergies between specific job and phantom job combinations, particularly when traditionally it has usually been the "selfish" DPS jobs that benefited the most while the others often didn't have anything special going on for them.

While that might sound dull, again, my preference so long as pJobs are ostensibly to be used as any main job is to, well, continue letting them be usable on any job

You can use most if not all phantom job or Logos/Lost Actions on any job. Of course, inevitably some will be better with specific ones. pBerserker is clearly designed to be used by WAR/DRK but luckily anyone else can also make use of them with the help of an Oracle. Optimal doesn't always mean the most used or fun in any case, as stuff like Watcher (for permanent instant cast), Breathtaker (for quasi-permanent Potion and Ether kits) and Beast (for DPS sustain and survival) in Bozja was quite popular outside of DRS due to their powerful effects, even if it meant dealing less damage.