I can already assume that this won't be a popular opinion, but I figured, hey, why not make my own thread in which most commenters refute the OP.
But I wanted to gush about how Zodiark was presented and handled in EW. Exceeded my expectations.
After the initial shock that his trial was the 83 instead of the 87 or 89 that I was expecting (did anyone think he'd be the final boss?), I was in giddy delight at how ...anticlimatic but in a satisfying way he was. Zodiark was nothing more than the giant well of aether and desire to stop the destruction caused by the Final Days. A glorified aetheric magnetic field protecting the planet from cosmic radiation with evil intent. And that fits with what we learned in Shadowbringers - he's only a primal, if one with a vastly larger quantity of aether than the ones we faced so far, so he's comparable to Eden (or Phoenix as we also learned in Coils) in how it is through the flooding of aether into the land leads to the rejuvenation of planetary life. But that how Zodiark operates isn't something completely different from these previous examples.
That Zodiark was never meant to address the root cause of the Final Days, but be the effective cure for the effects of the Final Days but to do so in a resource hogging way and one that kicks the can down the road by not address or offering a solution to the cause. Which feels extremely realistic to the real world, even if one discounts that his creation was a rush job under pressure.
And with the heart [Elidibus] missing, that Zodiark was mostly void of personality and direction allowing Fandaniel to mold it. I liked that! Sure, the Fandainel-Zodiark was akin to piloting a suit, perhaps - but also that we know from established primal lore that while each time a primal is summoned they share characteristics, but the will of the summoner can influence their behavior (Ga bu and Titan). With Elidibus detached from Zodiark and then killed, there was this weird Schrodinger's Cat vibe to Zodiark himself, almost this feeling of why was he still manifesting as a summoned being instead of returned to the Lifestream.
But I like even back in ARR there was this question of why did the Ascians worship Zodiark in the first place/what was the point of him, and that Shadowbringers answered that by establishing the Final Days and thus making Zodiark himself secondary to the actual enemy of the cause of the Final Days (Meteion being a more fleshed out and fully realized Necron, especially with how the Z/H and Ascian plot mirrors FF IX was another realization that made me beam with delight). Therefore I adore that Zodiark's role in Endwalker's narrative was not lingered on and addressed so quickly instead of overstaying its importance. To me, we got exactly the amount of Zodiark that we needed. But I know that feeling is subjective.
Plus, hey, the Amano artwork recreation was nice too (and Hydaelyn even better).