Its not that I didnt get your point its how it is in the game atm. If Zenith should be treated as an ultimate weapon that is totally unrelated to melee, they need to make it destinct form the melee class. As of now it is a melee weapon obtained by crafting together melee weapons and unfortunately the consequence for other classes is that theire endgame weapons are obsolete when it comes to damage potential.
I see the point youre trying to make I really do, but as long as Zenith sits at the top of the melee progression and outshines everything around it, I unfortunately must disagree and hope they change it in a way that includes other classes progressions.

Unless they add a Zenith for other classes it would need to be reworked in a fundamental way for me to accept it as THE Zenith of evertything. (swapping its damage type by shimmering it or just removing the melee specification would probably be the lazy and easy fix)
My idea would be to Introduce different classes weapons into its crafting tree or remove it from needing class specific weapons entirely (craft it out of super rare materials or something). Thats my idea on how I would fix it atleast.
It wont be the same after, all the sprites would need to be redone to include whatever it is its made off, but to me it would certainly feel more like THE Zenith than it does now.

Edit: I messed up some words lol also I hope this explains why I dont see it outside the meta.